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Timber and Void Structure Enhancing Geological Engagement in Iceland

Authors:
Josh Coppick, Chandler Brown
Timber and Void Structure Enhancing Geological Engagement in Iceland
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Constructed with a unique sawn void that connects the observation tower to the surrounding geological features, the design encourages exploration while providing access to the natural caves of Grjótagjá in Iceland.
5 key facts about this project
01
An exposed void structure provides direct views of the geological rift.
02
The design integrates heavy timber elements to enhance warmth and intimacy.
03
Pathways are elevated to protect visitors from the rugged terrain and harsh weather.
04
Wooden-framed panels echo local geological formations in their motif.
05
The project prioritizes visitor engagement with the surrounding natural landscape.

The SIERRA GRJÓTAGJÁ project is an observation tower located in Grjótagjá, Iceland, designed to enhance access to the region's natural caves. This structure embodies the concept of division, drawing inspiration from the tectonic movements of the area. The overall design connects the built environment with the geological features, inviting users to engage with both.

Geological Reflection

The design features a prominent void that runs through the structure, mirroring the geological rift of the landscape. This void serves a dual purpose: it provides visual access to the cave entries and emphasizes the dynamic relationship between the architecture and the natural surroundings. Visitors can closely observe the geological features while navigating the space.

Pathway Integration

A carefully designed pathway leads visitors across the lava field in a protected environment. The elevated platform keeps users safe from harsh weather and rugged terrain. The linear design of the path aligns with the motifs found in the surrounding geology. This encourages exploration and interaction with the landscape.

Interior Atmosphere

Inside the tower, heavy timber structures contribute warmth and intimacy. The design incorporates wooden-framed panels between supporting columns, reinforcing the sawn motif and enhancing thermal efficiency. This creates a comforting environment for visitors, echoing the natural forms of the landscape outside.

As people approach the structure, they experience a mix of textures and forms that reflect the surrounding geology. The interplay of materials highlights the relationship between the natural landscape and the built environment, inviting thoughtful engagement with this distinct location.

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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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Design the next suburban home for the USA

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Eligibility Open to all
Early bird registration deadline 19 November 2025

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