Expo 2030 Riyadh Site Plan: King Salman Science Oasis

The site plan for Expo 2030 Riyadh represents one of the most sophisticated pieces of large-scale urban design undertaken in the twenty-first century. Spanning 6.06 square kilometers in northern Riyadh, the site is organized around the concept of the King Salman Science Oasis — a name that simultaneously evokes the life-sustaining role of oases in Arabian culture and signals the site’s post-Expo destiny as a permanent center for scientific discovery and education. The masterplan, developed by an international consortium of architecture and urban planning firms under the coordination of the Royal Commission for Riyadh City, integrates pavilion zones, public spaces, transportation networks, utility infrastructure, and environmental systems into a cohesive whole that must function for six months as the world’s largest exhibition venue and for decades thereafter as a thriving urban district.

Geographic Context and Site Selection

The site occupies a strategically chosen parcel in the northern expansion corridor of Riyadh, bounded by major transportation arteries and positioned to leverage both existing and planned infrastructure investments. To the south, King Salman Road provides the primary vehicular connection to central Riyadh, linking the Expo site to the city’s commercial and governmental core. To the east, the site connects to the Northern Ring Road, which provides circumferential access and connections to King Khalid International Airport approximately 25 kilometers to the northeast. To the west, the site abuts the northern terminus of King Salman Park, creating a continuous green corridor that extends from the heart of the city to the Expo gates.

The terrain is characteristic of the Najd Plateau on which Riyadh sits — relatively flat with gentle undulations, composed of limestone and sedimentary formations covered by sandy soil. The flatness of the terrain simplifies construction but creates challenges for stormwater management, as the absence of natural drainage gradients requires engineered solutions. The site’s elevation of approximately 620 meters above sea level provides slightly cooler temperatures than the lower-lying areas of the Arabian Peninsula, though climate management remains a critical design consideration.

Prior to selection as the Expo site, the parcel was largely undeveloped, with some scattered residential and agricultural uses at its periphery. The absence of significant existing structures simplified the site preparation process but also meant that all infrastructure — roads, utilities, telecommunications, water, sewerage, and power — had to be built from scratch. This greenfield condition, while costly, offered the advantage of enabling a fully integrated design unconstrained by legacy infrastructure.

Masterplan Organization

The site plan is organized around a hierarchical spatial structure that progresses from the macro scale of the overall layout down to the micro scale of individual pavilion neighborhoods. At the highest level, the site is divided into five primary zones, each serving distinct functions while maintaining visual and pedestrian connectivity with the others.

The Central Spine: Avenue of Change

The Avenue of Change serves as the site’s primary organizing element — a broad, landscaped boulevard that runs roughly north-south through the center of the site for approximately 2.5 kilometers. This central spine functions simultaneously as a transportation corridor, a public gathering space, a wayfinding reference point, and a thematic narrative device. Visitors entering through the main gates are immediately oriented along the Avenue, which provides clear sightlines to key landmarks and distributes foot traffic to the secondary paths that branch off toward pavilion clusters.

The Avenue is designed at a generous width of approximately 60 meters, accommodating pedestrian flows of up to 50,000 people per hour in both directions. The central portion of the Avenue features a linear park with native plantings, water features, and shaded seating areas, flanked by wide pedestrian promenades on either side. An autonomous transit system runs beneath the Avenue in a dedicated underground corridor, providing rapid transportation between the site’s northern and southern extremities for visitors who prefer not to walk the full length.

At intervals along the Avenue, major public plazas create nodes of activity and serve as orientation points. These plazas are designed to host outdoor performances, cultural events, and temporary installations throughout the Expo’s six-month run. The largest of these, the Central Plaza, occupies approximately 40,000 square meters at the midpoint of the Avenue and serves as the site’s primary gathering space for major events, including the opening and closing ceremonies.

Zone 1: The Gateway District

The Gateway District occupies the southern portion of the site and contains the primary visitor entry points, transportation interchange, and arrival experience facilities. This zone is the first point of contact for the majority of visitors, who arrive via the Riyadh Metro, bus rapid transit, or private vehicles from the south.

The design of the Gateway District prioritizes smooth visitor flow from arrival to entry. The Riyadh Metro station, integrated directly into the site at the southern boundary, deposits passengers into a subterranean arrival hall that processes ticketing, security screening, and orientation before releasing visitors into the Expo at ground level. The transition from the utilitarian environment of the metro station to the curated experience of the Expo is carefully choreographed through a sequence of spaces that build anticipation — from the enclosed arrival hall, through a semi-outdoor atrium with filtered natural light, to the full panorama of the site as visitors emerge onto the southern terminus of the Avenue of Change.

Adjacent to the metro arrival, a bus terminal accommodates regional and shuttle bus services, including dedicated routes from King Khalid International Airport, major hotels, and park-and-ride facilities. Private vehicle access is managed through a series of parking structures located at the periphery of the Gateway District, connected to the main site by pedestrian bridges and moving walkways. The parking infrastructure accommodates approximately 40,000 vehicles, with additional overflow capacity at satellite parking locations served by shuttle buses.

The Gateway District also houses several key support facilities: the Expo Welcome Center, providing information services and accessibility support; the VIP and diplomatic reception center; media accreditation and press facilities; and the central security operations center. These facilities are architecturally integrated into the district’s design rather than presented as standalone utilitarian structures, maintaining the aesthetic coherence of the arrival experience.

Zone 2: National Pavilions East

The eastern pavilion zone contains approximately half of the national pavilions, organized into geographic clusters that facilitate cultural exploration. Visitors moving through this zone encounter thematic groupings — an Arab World cluster, an African cluster, a South and Southeast Asian cluster, and a European cluster — each with its own character and public spaces.

The Arab World cluster, positioned prominently near the Gateway District, showcases pavilions from Gulf Cooperation Council (GCC) states and the broader Arab League. This placement reflects both the host region’s prominence and the strong investment that neighboring states typically make in their Expo pavilions. The architectural guidelines for this cluster encourage design vocabulary that references Islamic geometric patterns, courtyard typologies, and the interplay of light and shadow characteristic of Arabian architecture, while allowing each nation to express its individual identity.

The African cluster occupies a generous allocation of space that reflects the continent’s 54 sovereign states and the Expo’s commitment to providing meaningful representation for developing nations. Many African pavilions are housed within shared structures that reduce individual countries’ costs while creating a vibrant, market-like atmosphere that evokes the energy of African urban environments. Shared outdoor spaces within the cluster host continuous cultural programming, including music, dance, and artisan demonstrations.

The Asian and European clusters follow similar organizational principles, with larger nations occupying self-built pavilions of significant architectural ambition and smaller nations grouped into shared facilities with individual interior spaces. The transitions between clusters are managed through landscaped buffer zones that provide visual separation, microclimate management through planting and shading, and incidental amenities such as rest areas, drinking water stations, and small food outlets.

Zone 3: National Pavilions West

The western pavilion zone mirrors the eastern zone in scale but differs in its geographic composition, housing pavilions from the Americas, Central and East Asia, the Pacific Islands, and additional European nations. The organizational principle of geographic clustering is maintained but applied with flexibility to accommodate the varying sizes and requirements of different national delegations.

The Americas cluster brings together pavilions from North, Central, and South America, creating opportunities for visitors to explore the cultural diversity of the Western Hemisphere within a compact area. The United States pavilion, typically one of the most visited at any World Exposition, occupies a premium location at the intersection of the Americas cluster and the central Avenue of Change, reflecting both its architectural ambition and the expected volume of visitor interest.

The East Asian cluster, featuring pavilions from China, Japan, South Korea, and neighboring states, represents some of the most technologically sophisticated exhibits at the Expo. These nations have consistently invested heavily in their World Exposition pavilions, using them as platforms for technological demonstration and cultural diplomacy. The site plan allocates generous plot sizes to accommodate the large-scale, high-technology installations that characterize East Asian pavilions.

Zone 4: Thematic District

The Thematic District occupies the central-western portion of the site and houses the Expo’s host country pavilions, thematic exhibitions, and the centerpiece structures that define the event’s architectural identity. Unlike the national pavilion zones, where architectural expression is distributed among dozens of independent designs, the Thematic District presents a coordinated architectural vision that embodies the “Era of Change” theme.

The Saudi Arabia Pavilion, the largest single structure in the Thematic District, serves as the host nation’s primary exhibition space. The design, selected through an international architecture competition, represents a bold architectural statement that references Saudi cultural heritage while projecting a future-oriented vision. The pavilion’s program includes permanent exhibitions on Saudi history and culture, interactive experiences showcasing Vision 2030 initiatives, and a large-scale immersive theater presenting the Kingdom’s vision for its future.

Flanking the Saudi Pavilion, three thematic pavilions correspond to the Expo’s sub-themes: “Tomorrow’s Together,” “Action for the Common Good,” and “Reasons for Hope.” Each thematic pavilion presents curated exhibitions and interactive experiences developed by international teams of scientists, artists, designers, and storytellers. These pavilions are designed to complement rather than compete with the national pavilions, offering synthesized narratives that draw connections across the diverse national perspectives presented elsewhere on the site.

The Thematic District also contains the Expo’s primary performance venues: a 3,000-seat indoor theater for major performances and ceremonies, a 15,000-capacity outdoor amphitheater for large-scale spectacles and concerts, and several smaller venues for intimate performances and conferences. These venues are clustered around a performance arts plaza that serves as the cultural heart of the site.

Zone 5: Innovation and Technology Campus

The northern portion of the site houses the Innovation and Technology Campus, a zone dedicated to corporate participation, startup showcases, and technology demonstrations. This zone represents a departure from traditional Expo layouts, which typically focus exclusively on national pavilions, by creating a dedicated space for the private sector and entrepreneurial ecosystem.

Major corporate pavilions from leading Saudi and international companies anchor the campus, with each corporation presenting exhibits that align with the Expo’s thematic framework while showcasing their technological capabilities and vision. The campus also includes an innovation hub — a shared workspace and exhibition facility where startups, research institutions, and social enterprises can present their work to the Expo’s global audience.

The Technology Campus is designed with a more contemporary, campus-like architectural character that differentiates it from the more formal pavilion zones. Lower building heights, more open green spaces, and a casual atmosphere create an environment that encourages informal interaction and serendipitous encounters. Outdoor demonstration areas allow for the testing and showcasing of emerging technologies — autonomous vehicles, drones, robotics, and renewable energy systems — in a real-world setting.

Visitor Flow Engineering

The science of visitor flow management is critical to the success of any large-scale event, and the Expo 2030 site plan incorporates sophisticated flow engineering principles derived from theme park design, urban transportation planning, and crowd dynamics research. The target of accommodating up to 300,000 visitors on peak days — equivalent to the population of a medium-sized city — requires meticulous attention to capacity, throughput, and distribution.

The site plan addresses visitor flow at three scales. At the macro scale, the distribution of attractions and amenities across the five zones ensures that visitors spread across the site rather than concentrating at a single point. The placement of high-draw pavilions — typically those of major nations and the thematic pavilions — at different locations throughout the site creates multiple poles of attraction that distribute foot traffic.

At the meso scale, the network of primary and secondary pathways is designed to provide multiple routes between any two points on the site, reducing the risk of bottlenecks. The Avenue of Change serves as the primary north-south artery, but parallel secondary paths through the pavilion zones provide alternative routes for visitors who prefer to explore laterally. Cross-connections between the eastern and western pavilion zones at regular intervals prevent the site from functioning as two disconnected halves.

At the micro scale, the design of individual pavilion entries, queuing areas, and exit paths manages the concentrated flows around popular attractions. Pavilions with expected high demand incorporate expanded queuing infrastructure, including shaded and climate-controlled waiting areas, entertainment during wait times, and timed entry systems that allow visitors to reserve slots via the Expo app and explore other attractions while waiting.

Landscape and Environmental Design

The landscape design of the Expo site must accomplish multiple objectives simultaneously: providing shade and microclimate management in Riyadh’s arid environment, creating an aesthetically compelling setting for the pavilions, supporting the Expo’s sustainability objectives, and establishing a landscape framework that will mature and improve in the decades following the event.

The planting strategy emphasizes drought-tolerant species native to the Arabian Peninsula and adapted species from similar arid climates worldwide. Date palms, the iconic tree of the Arabian landscape, feature prominently along major pathways and in public spaces, providing both shade and cultural resonance. Ghaf trees, acacias, and other native species are used extensively in naturalistic plantings that reference the region’s wild landscapes. Ornamental plantings in pavilion gardens and public plazas introduce more diverse species selected for visual impact and pollinator support.

Water features are used strategically throughout the site to provide evaporative cooling, visual interest, and acoustic masking of ambient noise. The design draws on the Islamic tradition of garden design, in which water — a precious resource in the desert — is celebrated through fountains, channels, and reflecting pools. All water features use recycled water, and the site’s water management system is designed as a closed loop that minimizes freshwater consumption.

The overall landscape framework is organized around a gradient from more formal, intensively maintained plantings near the central Avenue and major public spaces to more naturalistic, lower-maintenance landscapes at the site’s periphery. This gradient creates visual variety for visitors while ensuring that maintenance resources are concentrated where they have the greatest impact.

Infrastructure Integration

Beneath the visible landscape of pavilions and pathways lies a comprehensive infrastructure network that supports the site’s operational requirements. The utility infrastructure is organized in a system of accessible tunnels and trenches that run beneath the primary pathways, allowing maintenance and modification without disrupting surface activities.

The power distribution system delivers approximately 500 megawatts of capacity to the site, sufficient to support the energy demands of hundreds of pavilions, performance venues, transportation systems, lighting, and climate control. The system incorporates significant on-site renewable generation, including solar photovoltaic arrays integrated into building roofs and shade structures, and connects to the broader Riyadh power grid through multiple redundant feeds.

The telecommunications infrastructure provides blanket 5G coverage across the entire site, supporting both visitor connectivity and the operational systems that manage security, logistics, and visitor services. The digital infrastructure is designed for extreme density — the concentration of hundreds of thousands of smartphone-carrying visitors in a relatively compact area creates connectivity demands that exceed those of most urban environments. Edge computing facilities distributed across the site reduce latency and provide the processing capacity needed for real-time applications.

Water supply, sewerage, and waste management systems are designed for the extreme demands of a venue serving hundreds of thousands of daily visitors. The water system provides potable water through a network of treatment and distribution facilities, while a separate grey water system supports irrigation, toilet flushing, and water features. The waste management system incorporates source separation, on-site recycling facilities, and organic waste composting, supporting the Expo’s zero-waste-to-landfill target.

Climate Management Strategy

Riyadh’s climate presents the single greatest environmental challenge for the Expo site plan. While the October-through-March scheduling captures the cooler half of the year, daytime temperatures in October and March can still exceed 35 degrees Celsius, and solar radiation intensity remains high throughout the period. The site plan addresses climate management through a layered strategy that combines architectural design, landscape engineering, and active cooling systems.

The first layer of climate management is orientation and massing. Buildings and shade structures are oriented to minimize western sun exposure during the afternoon hours, when solar heat gain is most intense. The Avenue of Change is aligned roughly north-south, ensuring that at least one side of the boulevard is in shadow for most of the day. Pavilion clusters are arranged to create shaded courtyards and passages that remain comfortable even during peak sun hours.

The second layer is passive cooling through landscape and materiality. Extensive tree planting provides natural shading that reduces ground surface temperatures by 10 to 15 degrees Celsius compared to exposed pavement. Water features provide evaporative cooling that can reduce air temperatures by 3 to 5 degrees Celsius in their immediate vicinity. Building surfaces use high-albedo materials that reflect rather than absorb solar radiation, reducing the urban heat island effect.

The third layer is active cooling through mechanical systems. All enclosed pavilions and indoor spaces are fully air-conditioned, and major outdoor waiting areas and gathering spaces incorporate misting systems, evaporative coolers, and radiant cooling panels integrated into shade structures. The underground autonomous transit system provides a fully climate-controlled alternative to walking for visitors traversing long distances across the site.

Accessibility and Universal Design

The site plan incorporates universal design principles to ensure that the Expo is accessible to visitors of all abilities. The flat terrain of the site facilitates wheelchair and mobility device access, and all pathways maintain gentle gradients that comply with international accessibility standards. Tactile paving, audio wayfinding systems, and sign language interpretation services support visitors with visual and hearing impairments.

Accessibility considerations extend beyond physical access to encompass the full visitor experience. Pavilion exhibits are designed with multi-sensory engagement strategies that provide meaningful experiences for visitors with different abilities. Rest areas with seating, shade, and cooling are distributed at regular intervals across the site, providing relief for elderly visitors, families with young children, and anyone requiring a break from walking.

The Expo’s digital platforms, including the official website and mobile app, are designed to meet Web Content Accessibility Guidelines (WCAG) 2.1 AA standards, ensuring that visitors with disabilities can access information, purchase tickets, and plan their visits with the same ease as other users.

Post-Expo Transformation

The site plan is designed from the outset with the post-Expo transformation in mind. The infrastructure — roads, utilities, telecommunications, and transit connections — is built to permanent standards, not temporary Expo specifications. Building foundations and structural systems are designed to support future expansion and modification. The landscape framework is established with species and irrigation systems that will mature over decades, creating an increasingly verdant environment as the site transitions to its permanent use.

The King Salman Science Oasis, the site’s permanent anchor institution, will occupy the Thematic District and portions of the Innovation Campus, repurposing the Saudi Pavilion, thematic pavilions, and corporate exhibition spaces as permanent galleries, laboratories, and educational facilities. The national pavilion zones will be progressively redeveloped as mixed-use urban neighborhoods, with some pavilions retained as permanent cultural or commercial venues and others replaced by residential and office developments.

The Avenue of Change will be preserved as a permanent public boulevard and linear park, serving as the spine of the new urban district just as it served as the spine of the Expo. The transportation infrastructure — metro station, bus terminal, and road connections — will continue to serve the permanent development, ensuring that the district remains accessible and connected to the broader city.

Lessons from Previous Expo Site Plans

The site plan for Expo 2030 Riyadh reflects careful study of previous World Exposition sites, incorporating lessons learned from both successes and failures. The sprawling site plans of earlier Expos, which sometimes left visitors exhausted from walking vast distances between attractions, have informed Riyadh’s emphasis on internal transit, compact pavilion clustering, and distributed amenities.

The legacy challenges faced by previous Expo sites — notably the underutilization of Expo 2015 Milan’s site in the years following the event — have reinforced the importance of designing for post-Expo viability from the outset. Riyadh’s approach, which treats the Expo as the catalytic first phase of a permanent urban district rather than a temporary event requiring subsequent reinvention, represents the current state of the art in Expo legacy planning.

The success of Expo City Dubai, the permanent development that has emerged on the former Expo 2020 site, provides a contemporary precedent and proof of concept for the Riyadh approach. Dubai’s experience demonstrates that with forward planning and committed investment, an Expo site can transition successfully from a six-month event to a permanent urban destination.

The Expo 2030 Riyadh site plan, in its ambition, complexity, and attention to both immediate and long-term requirements, reflects the Kingdom’s determination to set a new standard for World Exposition design. The success of the plan will be measured not only by the visitor experience during the six-month run but by the vitality and value of the urban district that emerges in the decades that follow.