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Embodied Sustainability Through Engineered Timber and Natural Materials in a Visitor Center Design

Authors:
Jens Van Raemdonck, Giel Heymans
Embodied Sustainability Through Engineered Timber and Natural Materials in a Visitor Center Design
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Constructed with engineered wood and integrated into the volcanic landscape, the visitor center seamlessly blends natural materials with sustainable design to enhance access to Iceland's geothermal features.
5 key facts about this project
01
Constructed with a focus on geothermal energy, the building features a water recirculation system for sustainability.
02
The use of jute burlap for insulation enhances both performance and tactile quality in the design.
03
A spiral staircase offers a unique ascent while providing panoramic views of the surrounding landscape.
04
Modular construction techniques allow for flexibility in design and adaptability to the site’s geological conditions.
05
The structure's footprint aligns with the natural fault line to minimize environmental impact and preserve the landscape.

The Grjótagjá Cave Tower is a thoughtfully designed architectural project located near Grjótagjá Lake in Iceland. It serves as a visitor center that offers access to a notable geothermal area within a unique geological landscape. The project aims to create an engaging user experience while integrating comfortably with the surrounding environment.

The architectural design emphasizes critical relationships between the built environment and natural surroundings. The structure’s modular form follows the geological contours of the land, promoting harmonious interaction and maintaining the visual rhythm of the landscape. This facility incorporates a variety of public and private spaces, allowing visitors to engage meaningfully with the site while enjoying views of the dramatic terrain.

Sustainability is at the forefront of the design. A range of materials has been selected for their functionality and aesthetic appeal. The use of engineered wood for the structural framework provides both strength and a natural appearance. Jute burlap is utilized for insulation and surface treatment, offering a textural quality that complements the natural environment. Corrugated metal sheets form the roof, ensuring durability against the harsh climate, while glass panels deliver ample natural light and unobstructed views of the exterior.

The layout of the Grjótagjá Cave Tower supports a variety of visitor functions, including a café, information area, and locker rooms. The provision of an observation tower serves not only as a lookout point but also adds a unique vertical element to the design. This staircase spirals upwards, providing an immersive ascent that culminates in panoramic views, thereby enhancing the visitor's experience of the landscape.

The project stands apart from many others in its meticulous integration with the site’s geology and ecology. Unlike typical visitor centers, the Grjótagjá Cave Tower embodies a deep respect for its surroundings. The design minimizes environmental impacts through thoughtful site selection and construction techniques, such as utilizing a flexible foundation that accommodates local geological conditions.

This project exemplifies contemporary architecture's potential to foster a connection with nature. The adaptability of the structure allows it to serve diverse functions while also emphasizing sustainability and respect for the environment. For further insights into the architectural plans, sections, designs, and ideas that underpin this project, readers are encouraged to explore the detailed presentation of the Grjótagjá Cave Tower.

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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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