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Basalt Stone Facade and Recycled Concrete Structure in a Volcanic Landscape

Authors:
Milana Tokić, Lenka Tasić
Basalt Stone Facade and Recycled Concrete Structure in a Volcanic Landscape
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Set against the backdrop of Hverfjal volcano, the building's basalt stone facade and recycled concrete construction create a dialogue with the landscape while providing essential services as a visitor center and cafe.
5 key facts about this project
01
The building utilizes hexagonal modules that enhance structural stability and spatial flow.
02
Recycled concrete is employed for all major structural elements, promoting sustainability.
03
A glass roof allows for the observation of northern lights from the interior.
04
The layout preserves an existing trail, guiding visitors to nearby geological features.
05
Large windows frame the surrounding landscape and maximize natural daylight.

The STOD cafe and visitor center is located in the foothills of Hverfjal volcano in Myvatn, northeastern Iceland. The building serves as a gathering place for visitors exploring the unique volcanic landscape. Its design draws inspiration from the natural formations found in the area, creating a strong connection between the building and its environment. The structure reflects the rugged characteristics of the surroundings while providing essential services for those who come to experience the beauty of the region.

Design Concept

The layout consists of hexagonal modules arranged in a way that emphasizes both structure and function. The use of triangular shapes transforms into hexagonal forms, allowing for effective load distribution across the building. This design not only increases interior space but also enhances the flow from one area to another, encouraging movement throughout the facility.

Interior Space and Visitor Experience

The center comprises three levels and covers a footprint of 660 m², providing ample space for various activities. The main entrance is centrally located on the ground floor, designed to shield visitors from harsh winds typical of the area. This feature improves arrival experiences and promotes fluidity in the movement of guests within the building. The interior layout encourages exploration by offering various programmatic options, allowing visitors to choose their paths.

Materiality and Environmental Integration

Recycled concrete forms the core of the building's structural elements, allowing it to utilize thermal mass principles that manage indoor climate effectively. Polished concrete flooring is used throughout, providing durability in high-use areas while harmonizing with the rugged exterior. Additionally, locally sourced birchwood enhances other interior features, such as ceilings and furniture, adding warmth to the overall atmosphere. The facade also incorporates basalt stone, further anchoring the design within the volcanic landscape.

Natural Lighting and Views

Generous windows throughout the facade bring in natural light, brightening the interior and framing views of the surrounding landscape. A glass roof adds zenithal lighting, allowing visitors to enjoy the northern lights, a natural phenomenon that adds to the experience of the region. Hexagonal paving stones lead from the building to the existing trail, linking the visitor center to the geological features that attract visitors and reinforcing the connection between architecture and nature.

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The Buildner’s Unbuilt Award 2025: Celebrating Architectural Creativity and Visionary Unbuilt Designs with a Total Prize Fund of €100,000

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Competition organisers

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.

Buildner's Unbuilt Award 2025

Celebrating your unbuilt architecture visions with a €100,000 prize

100,000€ Prize / 2025 ideas COMPETITION
Prize 100,000 €
Eligibility Open to all
Final registration deadline 30 October 2025

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