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Basalt Flooring and Undulating Roof Form in a Visitor Experience Center

Author:
Maren Robertson
Basalt Flooring and Undulating Roof Form in a Visitor Experience Center
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With its undulating roof form reflecting the local geology and basalt flooring that links it to the surrounding environment, the center provides an immersive visitor experience at the geothermal caves of Grjótagjá.
5 key facts about this project
01
The visitor center's architecture is oriented to protect against prevailing winds while maximizing sunlight.
02
Local basalt is used for flooring, connecting the facility to its geological context.
03
The undulating roof design mirrors the natural forms of the surrounding landscape.
04
Large windows allow for panoramic views, enhancing the visitor experience.
05
A direct pathway leads visitors to the tower and caves, promoting engagement with the site.

The Observation Tower and Visitor Center at Grjótagjá is located in Iceland, close to the well-known geothermal caves of Grjótagjá. The facility enhances visitor experiences by providing a space for information, viewing, and interaction with the striking landscape. The design focuses on a strong connection with the environment, using forms that reflect the unique geological features of the site.

Design Concept

The focus of the design is on integrating the building with the landscape while ensuring it serves practical purposes for visitors. The visitor center has a low profile, positioned to shield against the winds coming from the northeast and northwest while maximizing exposure to sunlight and views from the southeast and southwest. The layout includes both open and enclosed spaces that allow for different visitor experiences, creating a varied journey through the site.

Visitor Pathways

Visitors enter the center and follow a central pathway that divides the building, guiding them toward the tower. This pathway is bordered by wooden columns, contributing to a sense of openness. A skylight above allows natural light to illuminate the interior, creating a warm atmosphere. The northern part of the visitor center includes support facilities, while the southern section opens up to substantial views, enhancing the visitor's connection to the surrounding nature.

Observation Tower

Rising two and a half stories, the Observation Tower features a roof that undulates, mimicking the contours of the nearby rocky landscape. The design contrasts closed panels along the stairway with large windows on three sides of each landing. This arrangement leads to a viewing platform that provides a complete panorama of the breathtaking environment, inviting people to engage with the landscape in a meaningful way.

Materiality and Details

Careful consideration of materials is evident throughout the design. Locally sourced basalt is used for flooring tiles, and timber features prominently in the structural components. These materials align with local building traditions and enhance the sensory experience of the site. The choices reflect a commitment to sustainability, ensuring that the project harmonizes with its surroundings.

The visitor center layout includes both indoor and outdoor spaces, with a deck providing direct access to pathways leading to the caves and the tower. This design encourages exploration and allows visitors to immerse themselves in the unique landscape of Iceland.

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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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