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Rammed Earth Pavilion Embracing Circular Pathways at Geothermal Caves

Authors:
Ismael Fernández, Alejandra Esteve, Matan Mayer
Rammed Earth Pavilion Embracing Circular Pathways at Geothermal Caves
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Rammed earth walls and circular pathways create a seamless connection between visitors and the geothermal caves, enhancing the exploration experience while promoting sustainability and environmental awareness.
5 key facts about this project
01
Rammed earth walls provide natural thermal regulation.
02
Circular pathways enhance visitor engagement with the landscape.
03
The design draws inspiration from local geological features.
04
Geothermal heating and cooling systems are integrated for efficiency.
05
Copper cladding connects the pavilion to regional architectural traditions.

The Grojtagja caves in northern Iceland are a captivating feature of the landscape, combining geological significance with natural beauty. The design of the visitor pavilion aims to enhance the experience of exploring this unique site while managing the challenges posed by growing tourism. By creating a space that acts as a connection between the open landscape and the caves, the design encourages exploration and interaction with the environment.

Design Concept

The design focuses on establishing a conversation between the building and the natural fissures that define the area. Circular paths guide visitors through the site, leading them to different viewpoints of the caves and the surrounding landscape. This layout offers visitors both public and private experiences, allowing for varying levels of engagement while exploring the unique geological features.

Functionality and Structure

Inside the pavilion, the atmosphere is calm and simple. The design avoids unnecessary details, letting visitors connect directly with the surroundings. The overall shape of the building resembles a modern dolmen, providing a structure that feels at home in its natural environment. This form invites contemplation and a deeper appreciation of the caves and their history.

Materials and Sustainability

Sustainability is a key focus. The design uses rammed earth for the outer walls, which helps provide thermal regulation through geothermal pipes that facilitate efficient heating and cooling. A concrete top belt supported by vertical steel ties gives the building strength, suitable for the harsh Icelandic weather. Mineral wool insulation enhances energy performance, while timber trusses in the roof structure support both function and aesthetic appeal. The copper sheet roof cladding connects with local traditions and complements the overall design.

Attention to Detail

The circular pathways encourage visitors to take their time. As they walk through the pavilion, they experience a journey that allows them to connect with the geological features of the Grojtagja caves. Every design element contributes to this immersive experience, transforming an ordinary visit into an opportunity for reflection and appreciation of nature and history.

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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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