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Carbon-Proofed Concrete Structure Embracing Natural Light in a Volcanic Landscape

Authors:
Michael Anselm, Marten Buns
Carbon-Proofed Concrete Structure Embracing Natural Light in a Volcanic Landscape
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The use of carbon-proofed concrete walls and vast perforated surfaces creates an atmosphere of shifting light, enhancing the visitor experience while providing educational insights in a center dedicated to the geological wonders of the Grjotagja caves.
5 key facts about this project
01
The building features a twisting form that enhances visibility from various distances.
02
Carbon-proofed concrete walls allow for significant material reduction without compromising design integrity.
03
Spiral platforms provide multi-level exhibition spaces showcasing local geological features.
04
Perforated surfaces create dynamic light patterns, mimicking effects found in natural caves.
05
Movable stone tablets facilitate interactive engagement with changing light and space.

The design focused on the Grjotagja caves is located in a dramatic landscape of volcanic formations, boiling mud, and the Blue Lake. It aims to serve as both a visitor center and an observation point. The concept is built on connecting the architecture to the natural environment, enhancing the experience for visitors while allowing them to engage meaningfully with the geological features of the area.

Form and Landscape Integration

The layout is characterized by a twisting shape that draws attention from various distances, establishing a presence within the landscape. This form complements the surrounding natural contours, creating a link between the building and the earth. It acts as a bridge, connecting crevices while highlighting the geological formations that define the area.

Functional Layout

Inside, the design focuses on practicality and visitation. There are spiral platforms that function as exhibition spaces, offering information about both local geology and cultural significance. Essential facilities, such as waiting areas, an information office, and a café, have been included to improve visitor comfort and navigation through the space. The layout is arranged to invite exploration and curiosity.

Material Usage and Sustainability

Concrete walls feature carbon proofing techniques that reduce material use by about 50%. This method results in thinner walls, which visually relate to the landscape. By placing importance on sustainability, the approach reflects an awareness of environmental issues and strives to lessen impact during construction.

Natural Light and Atmosphere

Natural light significantly influences the interior environment. Perforated surfaces allow light to filter in, creating changing patterns throughout the day. These effects resonate with the natural light found in nearby caves. Furthermore, movable stone tablets in the design enhance interaction with light. This design element leads to a lively atmosphere that encourages visitors to engage with the geological features and the space itself.

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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.

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