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Embracing Geological Formations with Rock and Gabion Walls in a Thermal Springs Retreat

Authors:
Justin Watts, Lewis Johnson
Embracing Geological Formations with Rock and Gabion Walls in a Thermal Springs Retreat
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Constructed with locally sourced rock and gabion walls, the guest house integrates seamlessly into the volcanic landscape, providing visitors with a unique thermal springs experience while preserving the natural topography.
5 key facts about this project
01
Constructed using local rock and gabion walls to enhance integration with the volcanic landscape.
02
Designed with a central spine that symbolizes the geological formations beneath it.
03
Features individual guest pods that promote both privacy and communal interaction.
04
Incorporates a green roof that merges with the existing ground cover for ecological benefits.
05
Utilizes a heat pump system to optimize energy efficiency through natural thermal sources.

The Icelandic Thermal Springs Guest House is located in the Northern Volcanic Rift Zone of Iceland, specifically between the Þeistareykir and Krafla rift zones along the Mid-Atlantic Ridge. Designed for visitors seeking accommodation, the structure respects the unique geological and climatic qualities of its surroundings. The design emphasizes a connection between the indoor environment and the natural landscape, with a focus on sustainability and community interaction.

Primary Structural Elements

A central spine serves as the main organizing feature of the building. This spine reflects the geological layers beneath the surface and guides movement across the site. It connects individual guest pods with shared spaces, allowing for easy circulation within the structure. A visually distinct secondary axis runs parallel, marked by a vivid blue line, inspired by glacial rivers and the colors of the Aurora Borealis. This element enriches the visual character of the building, making it a unique landmark.

Integration with Landscape

The site strategy emphasizes the relationship between the building and the natural terrain. The rear volume of the guest house is set into the hillside, which helps reduce its visual impact and blend it into the landscape. A green roof adds to this integration by merging with the surrounding ground cover, thereby reinforcing the connection to the environment while enhancing the ecological footprint of the design.

Sustainability Features

Sustainability is a critical aspect of the design approach. The excavation needed for the communal hot tub is repurposed; the rock that is removed becomes part of gabion walls and pathways. This practice minimizes waste and contributes to the functional and aesthetic qualities of the site. The focus on reusing materials reflects a commitment to environmental responsibility.

Energy and Light Management

The project incorporates a heat pump system that utilizes both thermal mass and volcanic ground heat for efficient energy use. This system ensures that hot water distribution is optimized, reducing energy waste. Additionally, the design includes recessed glazing and overhangs to properly manage sunlight, creating a comfortable atmosphere indoors while improving overall energy performance.

The guest pods feature wide windows that provide views of the surrounding landscape, allowing natural light to fill the spaces. This design choice not only enhances the interior experience but also strengthens the connection between the occupants and the captivating Icelandic scenery.

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

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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.

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