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Cave Tower Crafted with Volcanic Ash and Glulam Beams in Geothermal Landscape

Author:
James Erickson
Cave Tower Crafted with Volcanic Ash and Glulam Beams in Geothermal Landscape
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Constructed with glulam beams and volcanic ash, the cave tower rises in a geothermal landscape, creating a unique interaction between its interior warmth and the surrounding rugged terrain, serving as a communal space for visitors to engage with nature.
5 key facts about this project
01
Constructed with volcanic ash to enhance sustainability.
02
Features a cave tower structure that challenges traditional design.
03
Utilizes glulam beams sourced from local Icelandic forests.
04
Integrates geothermal spring water for heating and bathing.
05
Designed to interact directly with the surrounding rugged landscape.

The setting in Grjótagjá features geothermal springs and rugged landscapes, creating a unique backdrop for the design. The project explores the relationship between nature and human-made structures. It engages with themes of chaos and order, inviting people to experience how these elements coexist. Natural forces and materials play a significant role in shaping the overall concept, which emphasizes the connection to both the environment and the identity of the place.

Conceptual Framework

At the heart of the design is the idea of intense natural forces paused in time. This theme reflects the tension between destruction and nurturing tendencies in nature. The geothermal springs represent warmth and vitality, offering a focal point within the rugged surroundings. Daylight is purposefully integrated into interior spaces. This enhances the experience and showcases the textures and colors of the natural landscape, allowing a richer connection between people and their environment.

Structural Expression

The design includes a unique cave tower structure, positioned at an unconventional angle. This orientation challenges typical architectural norms. It creates a dialogue between the landscape and the inside spaces. Occupants can engage directly with changing weather conditions, heightening their interaction with the site. By intentionally obstructing views in certain areas, the design captures hidden elements. This encourages a curiosity and connection to both the architecture and its surroundings.

Sustainability Measures

Sustainability is a primary concern in the project. Structural strategies help minimize the ecological impact on the land. Concrete piers support the building, allowing it to rest lightly on the terrain. This approach limits any permanent alterations to the natural landscape. In this way, the design respects and honors the existing environment while accommodating modern needs.

Material Applications

The choice of materials reflects a commitment to local resources and environmental responsibility. Volcanic ash serves as a supplementary cement component, which decreases the need for standard cement use. Glulam beams from local forests provide the main structural support. Reclaimed steel is utilized for connections between elements, contributing to overall sustainability. Inside, basalt tiles, along with cellulose and sheep wool insulation, help achieve thermal efficiency and functionality.

The atmosphere created within the building benefits from ample sunlight, which streams into the spaces. This light enhances the connection between the interior and the rugged landscape outside, establishing a strong relationship with nature.

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The Buildner’s Unbuilt Award 2025: Celebrating Architectural Creativity and Visionary Unbuilt Designs with a Total Prize Fund of €100,000

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The Buildner’s Unbuilt Award 2025 is an international architecture competition dedicated to recognizing and celebrating the value of unrealized architectural designs. It invites architects, designers, and students worldwide to submit visionary projects that have not yet been constructed, highlighting the power of ideas and the creativity behind the design process. By focusing on unbuilt work, the competition aims to bring forward concepts that shape the future of architecture and push the boundaries of the profession. 

Participants can compete in three categories based on project scale: Small Wonders (up to 100 m²), Medium Marvels (101–999 m²), and Large Visions (over 1,000 m²). Each category winner will receive €20,000, and additional prizes include honorable mentions, student awards, and a special Best Presentation Award. Winning projects will gain significant international exposure through Buildner’s publicity campaign and a feature article on ArchDaily, providing a unique opportunity to showcase creative ideas to a global audience. 

The Buildner’s Unbuilt Award 2025 encourages entrants to submit any type of unbuilt project, from conceptual visions to detailed designs, celebrating bold innovation without the constraints of realization. Important deadlines: registration closes on October 30, 2025; submissions are due by November 20, 2025; winners will be announced on December 17, 2025.

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Celebrating your unbuilt architecture visions with a €100,000 prize

100,000€ Prize / 2025 ideas COMPETITION
Prize 100,000 €
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Final registration deadline 30 October 2025

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