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Cave-Like Experience with Twisting Concrete and Steel Structure

Authors:
Anya Jeffery, Nicole Dyer, Yutaro Sakai, Kyle Hoak
Cave-Like Experience with Twisting Concrete and Steel Structure
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The twisting concrete and steel form creates a cave-like environment that seamlessly integrates with Mývatn's landscape, serving as a visitor center inviting exploration of Iceland's natural beauty.
5 key facts about this project
01
The twisting structure mimics glacial river flows unique to Iceland.
02
An elevated boardwalk system enhances winter accessibility and safety.
03
Curved interior walls create a cave-like ambiance for visitors.
04
A central skylight allows for dynamic natural light throughout the day.
05
Weatherproofed aluminum panels ensure durability against harsh climate.

The GRJÓTAGJÁ Visitor Center is located in Mývatn, Iceland, surrounded by a unique landscape shaped by volcanic activity and glacial movements. This building serves as a hub for visitors to engage with the natural environment. Designed with a concept based on twisting forms, the structure reflects the area's geological features, characterized by curves and undulations that are typical of Iceland's terrain.

Design Concept

The design revolves around the idea of twisting, borrowing inspiration from the natural formations found in Iceland. It includes a concrete base that is partially embedded in the ground, a framework made of light gauge steel, and a spiral ramp with an elevator shaft and tower. This arrangement allows for open spaces that encourage exploration while remaining connected to the surrounding landscape.

Exterior Features

The visitor center incorporates an elevated path system made from textured bar grating. This design provides good traction in winter, helping visitors navigate through snow and ice safely. The paths connect various sections of the center, promoting a smooth flow between the building and its natural setting, allowing visitors to experience the landscape more fully.

Interior Experience

Inside, the design is reminiscent of exploring natural caves. Walls curve and ceilings slope, creating a feeling of movement and discovery. A central skylight allows natural light to filter into the main areas, enhancing the cave-like quality while creating changing patterns of light and shadow throughout the day.

Materials and Sustainability

Materials have been selected for strength and sustainability. The concrete provides a solid foundation, while light gauge steel supports the overall structure. Weatherproofed aluminum panels cover the exterior, ensuring durability against the harsh Icelandic climate. Photovoltaic panels have been integrated into the design, contributing to the building’s energy needs and reinforcing its commitment to sustainability.

The design culminates in a blend of interior and exterior spaces. The curved walls and ceilings create an immersive environment that encourages visitors to engage with both the building and the surrounding natural beauty. Each element of the center has been thoughtfully considered to enhance the overall experience while respecting the uniqueness of the landscape.

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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.

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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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