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Translucent Glass Walls and Volcanic Concrete at Iceland's Tectonic Divide

Authors:
Erwin Riefkohl, Alexandra Betancourt, Mia Riefkohl
Translucent Glass Walls and Volcanic Concrete at Iceland's Tectonic Divide
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Constructed with volcanic concrete and translucent glass walls, the design integrates into Iceland's tectonic landscape, offering pathways and a retreat space for visitors drawn to this unique geological setting.
5 key facts about this project
01
Constructed with prefabricated volcanic ash concrete that reflects local geology.
02
Features a modular thermally broken glass system for energy efficiency and light filtration.
03
Integrates flexible pathways designed to mimic the flow of Iceland's braided glacial rivers.
04
Includes a dedicated cube structure for visitor amenities like a café and dressing rooms.
05
Utilizes fiber optic cables in interior walls for enhanced illumination and atmosphere.

Diverging Paths is located within the dramatic landscapes of Iceland, at the tectonic divide between the North American and Eurasian Plates. Situated between the entrances of Karlagjá, the design intends to connect strongly with the geological forces that have shaped this area. The project integrates pathways and structures aimed at promoting exploration while complementing the natural surroundings.

Pathway Modules
The pathways are made of wood planks, organized into three primary modules. Each pathway has hinged vertical planks that act as flexible barriers, enabling them to adjust according to arch angles. This design mirrors the natural changes seen in Iceland's braided glacial rivers, allowing the pathways to take on different forms while extending across the landscape. Some planks are stacked to create staircases that lead up to Vogagjá, enhancing the interactive experience for visitors.

Architectural Form
The tower features a brutalist style that reflects the rugged beauty of the Icelandic terrain. It acts as a representation of the land's low-pitched rhythm, with the pathways flowing around it. This relationship between the tower and pathways emphasizes both vertical and horizontal movements, capturing the lively essence of the surroundings. Visitors can engage with the architecture from multiple viewpoints, which builds a deeper connection to the landscape.

Materiality and Structural Design
The tower is built with prefabricated volcanic ash concrete that aligns with the geological history of the region. Inside, the walls combine prefabricated concrete and translucent modular concrete, enhanced by fiber optic cables embedded within the blocks. This combination creates an atmosphere that reflects the natural elements outside. The modular thermally broken glass wall system allows light to filter through, featuring a gradient hue inspired by the local hot springs. The color deepens at the base and lightens towards the top, providing a visually engaging experience.

Visitor Amenities
A cube-like structure extends from the tower, specifically designed for visitors of Kvennagjá. It includes a café, bath, and dressing rooms, adding comfort while encouraging interaction with the landscape. This additional space enhances the visitor experience and creates a stronger connection to the site.

As visitors ascend the tower, they experience a dynamic interplay of light and shadow created by the gradient glass walls. The shifting hues change with movement, fostering a unique feeling of engagement with the environment.

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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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