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Tectonic Boundary Structure with Reflective Features Overlooking Natural Landscapes

Author:
Hansol Yoo
Tectonic Boundary Structure with Reflective Features Overlooking Natural Landscapes
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Rising at the tectonic boundary of two continental plates, the observatory features a cave-like space and reflective walls that engage visitors with the surrounding natural landscape while serving as a vantage point for exploration.
5 key facts about this project
01
Cave-like space designed to integrate with the natural landscape.
02
Reflective walls enhance the connection between interior and exterior environments.
03
Positioned at the tectonic boundary of two continental plates.
04
Multiple viewing points offer varied perspectives of the surrounding geology.
05
Facade mimics cracked boundary stone, echoing the site's geological features.

The Iceland Cave Tower is located at Grjotagjá, a notable cave hot spring in Northern Iceland. This setting is defined by its position at the boundary of the North American and Eurasian tectonic plates. The tower functions as an observatory, providing visitors an opportunity to engage with the striking landscape while being mindful of the ecological context. The design concept reflects a desire to connect the natural environment with human experience, fostering a relationship between the constructed space and its geographical surroundings.

Geological Engagement

The design draws inspiration from the area's geological features. The name Grjotagjá translates to "stone gap," highlighting the connection to the landscape. The observatory rises above the ground, offering vantage points to appreciate the unique forms of the terrain. By aligning the structure with the physical characteristics of the site, the design emphasizes the relationship between the architecture and the geology of the region.

Cave-like Formation

A notable feature of the tower is the creation of a cave-like area beneath the observatory. This space accommodates visitors while enhancing the experience of being in a natural setting. The design respects the contours of the landscape, helping to integrate human activity within the geological formation. This cave-like space invites visitors to explore and reflect on their surroundings, encouraging a deeper understanding of the site.

Reflective Experience

The observatory includes several viewing points that allow visitors to take in the landscape from different perspectives. This arrangement enriches the visitor's experience, enabling them to appreciate the details of the surroundings while minimizing any impact on the ecosystem. Internally, a reflective wall draws the landscape into the building, creating a strong connection between the outside world and the interior space. This design choice enhances the experience of visitors, linking them more closely to the natural environment.

Facade and Aesthetic

The exterior of the building mimics the look of cracked stone, resembling the geological characteristics of the area. This design choice helps to establish a connection with the environment, reinforcing the relationship between the structure and the landscape. The facade serves both an aesthetic and functional purpose, drawing attention to the geological features of the location.

The observatory culminates in a rooftop that provides panoramic views of the landscape, allowing visitors to appreciate the unique topography 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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Competition organisers

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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100,000€ Prize / 2025 ideas COMPETITION
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