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Basalt-Inspired Structure with Scorched Larch and Geothermal Features

Authors:
Adam Clark, Nick Pearce, Jessica Wilkie
Basalt-Inspired Structure with Scorched Larch and Geothermal Features
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Inspired by volcanic basalt formations, the structure utilizes scorched larch and geothermal systems to create a cohesive visitor experience centered around exploring Iceland's unique caves.
5 key facts about this project
01
Inspired by local basalt formations, the tower's design features a hexagonal geometry.
02
A fault line bridge connects the visitor centre to the lookout tower, reflecting tectonic features.
03
Scorched larch cladding enhances durability while blending with the natural landscape.
04
Geothermal heating systems provide efficient climate control throughout the structure.
05
The metal walkways allow safe access to the caves without disrupting the geological formations.

The Vogagjá Project in Iceland includes a visitor centre, lookout tower, and café, all designed to fit within the volcanic landscape. The concept is inspired by the unique geometric shapes of basalt formations found throughout the region. The design aims to create a connection between the built environment and the natural world. Each element serves a particular purpose and enhances the overall experience for visitors, who come to learn about the geology of the area.

Visitor Centre

The visitor centre is the first stop, located at the end of a gentle steel ramp leading from a car park made of volcanic ash. This facility is designed as a pod that includes ticketing services, management offices, and an audio-visual exhibit on the caves’ history and geology. The arrangement encourages visitors to engage with the information presented, preparing them for the exploration ahead.

Lookout Tower

The lookout tower plays a central role in the project, approached via a fault line bridge that reflects the tectonic activity in the area. The tower’s design resembles a hexagonal basalt column. Inside, visitors ascend through an open grid stair system that provides varied views as they climb. At the top, a panoramic observation point allows a full view of the surrounding volcanic landscape. This upward journey reinforces the geological context of the site.

Cave Access and Café

Returning from the tower involves taking a glass lift, which provides accessible options for all visitors. This lift connects to metal walkways leading into the caves, ensuring safe navigation around the natural formations. After exploring the caves, visitors arrive at a café, designed as a comfortable space that encourages social interaction. This inviting area offers refreshments and allows guests to reflect on their overall experience.

Sustainability and Materials

The project emphasizes low-tech construction methods while focusing on sustainability and energy efficiency. Scorched larch timber is used for the cladding of the pod structures. This choice combines practicality with a visual connection to the landscape. Additionally, pre-fabricated super insulated panels support a lightweight steel frame, achieving airtight construction in line with Passivhaus standards. Geothermal technology serves as the heating source, while rainwater harvesting systems address non-potable needs, reflecting a commitment to environmental care.

The design is also mindful of interior details. The café features natural finishes that echo the surrounding landscape. This focus on natural elements helps strengthen visitors’ connection to the site, creating a space for contemplation framed by Iceland’s distinct topography.

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The Buildner’s Unbuilt Award 2025 is an international architecture competition dedicated to recognizing and celebrating the value of unrealized architectural designs. It invites architects, designers, and students worldwide to submit visionary projects that have not yet been constructed, highlighting the power of ideas and the creativity behind the design process. By focusing on unbuilt work, the competition aims to bring forward concepts that shape the future of architecture and push the boundaries of the profession. 

Participants can compete in three categories based on project scale: Small Wonders (up to 100 m²), Medium Marvels (101–999 m²), and Large Visions (over 1,000 m²). Each category winner will receive €20,000, and additional prizes include honorable mentions, student awards, and a special Best Presentation Award. Winning projects will gain significant international exposure through Buildner’s publicity campaign and a feature article on ArchDaily, providing a unique opportunity to showcase creative ideas to a global audience. 

The Buildner’s Unbuilt Award 2025 encourages entrants to submit any type of unbuilt project, from conceptual visions to detailed designs, celebrating bold innovation without the constraints of realization. Important deadlines: registration closes on October 30, 2025; submissions are due by November 20, 2025; winners will be announced on December 17, 2025.

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