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Architects: Urko Sanchez Architects
- Area: 28000 m²
- Year: 2025
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Professionals: MIDRAR, Freyssinet Saudi, Elbaz + Gil de Montes, Nada Debs Studio, Walk Architects (Juan Tur), +1

Infrastructure has long defined the backbone of cities by linking people, landscapes, and economies through systems that often go unnoticed until they fail. Today, as global challenges demand more adaptive and human-centered responses, architects are rethinking what infrastructure can be: not just a framework for movement and utility, but a catalyst for ecological restoration, cultural continuity, and civic imagination. The following unbuilt projects, submitted by the ArchDaily community, explore this expanded role of infrastructure, where airports, bridges, industrial parks, and pedestrian networks become architectural expressions of connection and care.


The second edition of the Islamic Arts Biennale, titled And All That Is In Between, has officially opened in Jeddah. Organized by the Diriyah Biennale Foundation, the Biennale takes place at the Western Hajj Terminal of King Abdulaziz International Airport, a site that holds profound significance for millions of Muslim pilgrims traveling for Hajj and Umrah. The exhibition scenography is designed by the international architecture firm OMA, enhancing the experience with a thoughtful spatial narrative. The exhibition, which runs until May 25, 2025, explores how faith is experienced, expressed, and celebrated through feeling, thinking, and making.

The Royal Commission for Riyadh City (RCRC) has confirmed that the Orange Line of the Riyadh Metro, also known as the Al Madinah Al Munawwarah Axis, began operations on Sunday, January 5, 2025. Spanning 41 kilometers, the Orange Line runs east to west, connecting Jeddah Road in the west to the Second Eastern Ring Road near Khashm Al Aan in the east in Saudi Arabia. This newly operational line is a key component of the city's metro system, designed to enhance urban mobility and connectivity.

The Diriyah Biennale Foundation has announced Lebanon-based EAST Architecture Studio, in collaboration with artist Rayyane Tabet and engineering firm AKT II, as the winners of the inaugural AlMusalla Prize, a significant new architectural competition launched as part of the Islamic Arts Biennale. Their winning design, a modular structure inspired by regional weaving traditions, uses sustainable materials derived from local date palm waste, including palm fronds and fibers. After the four-month Biennale, the Musalla will be dismantled and reassembled at a new location.

The Diriyah Biennale Foundation has revealed the theme and title for the 2025 Islamic Arts Biennale: And all that is in between. Scheduled from January 25 to May 25, 2025, at the Western Hajj Terminal of King Abdulaziz International Airport in Jeddah, this second edition will explore how faith is experienced, expressed, and celebrated through the acts of feeling, thinking, and making.

Henning Larsen Architect has just revealed the designs for The Jeddah Opera House, a new local landmark in Saudi Arabia. Drawing inspiration from the historical Al-Balad neighborhood, the Opera House celebrates culture and regional geography. Situated along the Red Sea waterfront, the opera house aims to connect residents and visitors to the sea through a culture spine under a natural canopy. Extending from the city, through the opera house, to the water, this “spine” forms an integral part of the Jeddah Central masterplan for the new Opera Quarter.

The Diriyah Biennale Foundation has just unveiled the competition details for the AlMusalla Prize, along with the shortlisted architecture studios and the jury. An addition to the Islamic Arts Biennale, this international architecture competition focuses on designing a musalla, a flexible space for prayer and reflection accessible to people of all faiths. Situated in the Western Hajj Terminal of King Abdulaziz International Airport in Jeddah, Saudi Arabia, the musalla will be an integral part of the Biennale’s upcoming edition. The winner of the competition will be announced later this year, and the opening of the musalla will be held on January 25th, 2025.

The Kingdom of Saudi Arabia is now home to the world’s first 3D-printed mosque, spanning an area of 5,600 sqm. Located within the Al-Jawhara suburb of Jeddah, the mosque stands as a tribute to the late equestrian Abdulaziz Abdullah Sharbatly. The project by Forsan Real Estate utilizes cutting-edge 3D printing technology from Guanli.

Saudi Arabia, a country going through a tremendous transition, is not only changing its skyline but also redefining its identity on a global level. As part of their 2030 Vision serving as the compass, the kingdom is moving toward new developments, aiming to revive culture and diversify the economy. In fact, the capital, Riyadh, is leading the transformation by hosting the 2030 World Expo. Representing the country’s dedication to advancement, several mega projects are taking place and transforming the kingdom's fabric.
Amidst the various projects, many world-renowned firms are working on these mega projects at many different scales. For example, the cultural renaissance is shown through Snøhetta’s Opera House in Diriyah, while the Jeddah Tower is on a trajectory that will overtake the Burj Khalifa. In the meantime, Heatherwick Studio’s conversion of a Jeddah desalination plant into a thriving cultural center showcases their repurposing of industrial spaces. From coastal projects by Foster + Partners to city center skyscrapers that are redefining the skyline, the country is undergoing significant transformations in its built environment.

After a five-year pause, construction on the Jeddah Tower has resumed. Set to become the world’s tallest skyscraper and beat the UAE’s Burj Khalifa, the tower was designed by Adrian Smith + Gordon Gill Architecture and initially began construction in 2013. Interestingly, the Burj Khalifa was also designed by Adrian Smith while at Skidmore, Owings & Merrill. The scheme faced many delays, including a pause in 2018 and further setbacks due to the COVID-19 pandemic. Furthermore, the initial contractor was replaced during the 2017-2019 Saudi Arabian purge.

Heatherwick Studio has unveiled a new project to transform an old desalinization plant into the centerpiece of a new cultural district on the waterfront of Jeddah, Saudi Arabia. The industrial structure is set to be reconfigured to become The Museum, large complex offering production spaces, studios, and ateliers for artists and makers. Its program also includes exhibition spaces that can accommodate large-scale commissions to help visitors to learn and feel inspired by the next generation of artists.