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Volcanic Stone Structures with Compressed Grass Panels Enhancing Geothermal Wellness

Authors:
Baptiste Poiraud, Olga Arzul, Romain Poidevin
Volcanic Stone Structures with Compressed Grass Panels Enhancing Geothermal Wellness
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The use of volcanic stone and compressed grass panels merges with the geothermal landscape in a design that integrates hot springs and observation spaces, creating a unique destination for relaxation and exploration.
5 key facts about this project
01
Volcanic stone panels are used for thermal insulation and aesthetic coherence with the landscape.
02
Compressed grass panels enhance sustainability while providing natural insulation.
03
Large zenithal openings optimize natural light throughout the interior spaces.
04
An observation tower offers panoramic views of Iceland's unique geological features.
05
The building layout encourages seamless transitions between indoor and outdoor environments.

Allégorie is located in Iceland, a country known for its dramatic landscapes and geothermal activity. The design features a series of interconnected rooms that navigate between two natural caves filled with water. The layout invites visitors to engage with the surrounding environment while providing opportunities for relaxation. The overall concept reflects the contrast of fire and frost, highlighting the relationship between the man-made structure and nature.

Spatial Arrangement

The project layout consists of various spaces that rise along the rift, leading to an observation tower with views of the stunning Icelandic terrain. This vertical element serves as a focal point within the design. Visitors are encouraged to explore the different areas, promoting a rich experience while connecting them to the natural surroundings.

Natural Light Integration

At the core of the design is the use of large zenithal openings that bring in the unique northern light. These openings enhance the interior atmosphere, creating a warm and inviting environment. The light plays across the surfaces, adding depth and dimension to the spaces and fostering a sense of connection with the outdoors.

Material Selection

The materials chosen for the project are linked to the local geology. Volcanic stone panels, compressed grass panels, and charcoal wood facing are used throughout. These materials not only improve thermal insulation but also resonate with the landscape's colors and textures. The result is a cohesive design that feels inherently tied to its setting.

A key design detail can be found in the observation tower, which features an angular form that reflects the surrounding cliffs. This element deepens the relationship between the structure and its environment, allowing visitors to appreciate the breathtaking vistas of Iceland from a new angle. The thoughtful combination of space, light, and materials creates an inviting atmosphere that respects the natural beauty of the site.

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The Next House: USA — A Global Call to Reimagine the American Suburb

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Competition organisers

Buildner is launching The Next House: USA, a global architecture competition that challenges architects, designers, and thinkers to reimagine the American suburban home for the 21st century. For decades, the suburban house has symbolized comfort and stability, but today it often reflects excess, isolation, and environmental strain. This competition asks: how can the American home evolve to address climate urgency, economic pressures, and shifting social values?

Participants are tasked with designing a prototype home of no more than 1,500 sq ft (≈140 m²) for a household of two adults and one child. The design should be compact yet generous, adaptable, sustainable, affordable, and replicable across diverse U.S. contexts. More than a design exercise, the competition aims to spark a conversation about how homes can support healthier, smarter, and more connected communities.

The total prize fund is $20,000 USD. The final registration deadline is May 20, 2026, and winners will be announced on September 22, 2026. The Next House: USA invites architects, students, and visionaries worldwide to redefine what the American home means today—and what it should mean tomorrow.

The Next House: USA

Design the next suburban home for the USA

20,000 USD Prize ideas COMPETITION
Prize Monetary award
Eligibility Open to all
Early bird registration deadline 19 November 2025

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