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Volcanic Aggregates and Gray Concrete Anchoring Tectonic Engagements in Visitor Center Design

Authors:
Adriana Arteaga, Blake Villwock, Rahul Attraya
Volcanic Aggregates and Gray Concrete Anchoring Tectonic Engagements in Visitor Center Design
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Set against the tectonic ridge formed by the North American and Eurasian plates, the design integrates gray concrete and volcanic aggregates to create a visitor center that promotes community engagement and education within a unique geological context.
5 key facts about this project
01
Observation tower features a circular winding staircase leading to a roof oculus for expansive views.
02
Structures utilize faceted concrete blocks made from local volcanic aggregates, enhancing regional connection.
03
Halo bridge uniquely spans the tectonic plates, offering direct visual engagement with the landscape's geology.
04
Cairn garden invites visitors to participate in stone stacking, fostering interaction with the site’s natural elements.
05
Design incorporates passive sustainable systems, including rainwater collection and renewable energy for site lighting.

The Stone Marker Observation Tower and Visitor's Center is situated along the tectonic ridge between the North American and Eurasian plates, offering an educational platform within a landscape rich in geological importance. The design focuses on integrating the buildings with their natural surroundings, creating a space for community engagement and exploration of the unique environment. By using existing pathways, the structure minimizes disruption while enhancing the overall visitor experience.

Architectural Integration

The design features a set of carefully placed nodes along a fissure trail, guiding visitors through the geological wonders of the area. Key components include various pavilions, an outdoor hearth, a storytelling area, and a halo bridge that connects the two tectonic plates. Each element is positioned to allow for natural movement and interaction among visitors, creating spaces for both quiet reflection and social connection.

Visitor Engagement

An observation tower serves as the focal point of the site, complemented by a warming hut where visitors can gather around a central hearth. The canteen opens toward the fissure, enhancing the feeling of connection with the landscape. Facilities such as an office and a map room assist in visitor orientation and education, providing resources that link the physical experience to the geological narrative of the region.

Sustainability Considerations

The project incorporates various passive design techniques and sustainability measures. Buildings are arranged to create natural windbreaks around a central courtyard, while passive daylighting ensures comfortable interiors year-round. An onsite cistern captures rainwater for plumbing, and photovoltaic arrays generate renewable energy for lighting, aligning with approaches aimed at minimizing environmental impact.

Materiality and Interaction

The walls of the structures utilize faceted concrete blocks made with local volcanic aggregates. This choice of material connects the architecture to the regional geology while also providing structural support. The design includes an interactive cairn garden that invites visitors to partake in the Icelandic tradition of stone stacking, enabling them to engage with the landscape in a meaningful way.

The observation tower features a circular winding staircase leading up to a roof oculus, allowing visitors to interact with light and space. As people ascend, they are rewarded with expansive views of the surrounding geology, enhancing their understanding and appreciation of the site.

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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.

Buildner's Unbuilt Award 2025

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

100,000€ Prize / 2025 ideas COMPETITION
Prize 100,000 €
Eligibility Open to all
Final registration deadline 30 October 2025

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