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Cantilevered Viewing Platform with Sheet Metal and Polycarbonate Elements over Geological Fissure

Authors:
Dani Reimers, Camrin Plaatjes, Phillippe Fouché, Jacques Steyn
Cantilevered Viewing Platform with Sheet Metal and Polycarbonate Elements over Geological Fissure
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The cantilevered structure, crafted from sheet metal and polycarbonate, hovers above a geological fissure, providing a unique viewing platform for visitors to explore the Grjótagjá Caves.
5 key facts about this project
01
The structure is designed as a cantilever, extending over a geological fissure.
02
It features a dual triangular configuration for enhanced stability and visual impact.
03
Constructed with a combination of sheet metal and polycarbonate for durability.
04
The main circulation route consists of an open floor grate, offering views of the fissure.
05
Observation platforms are strategically placed for panoramic landscape perspectives.

The Jafnvægi Tower is a viewing platform located between Karlagjá and Kvennagjá, designed to serve as a landmark for visitors exploring the Grjótagjá Caves. Positioned directly above a fissure formed by the separation of the North American and Eurasian tectonic plates, the tower's design reflects the geological features of its surroundings. It employs a split structure that emphasizes balance and engages visitors with the unique context of the area.

Design Concept

The tower is defined by a series of right-angled triangles that create an elevated form. This geometric design mirrors the natural shapes found in the landscape and symbolizes the tension of the tectonic divergence below. The lifted structure directs attention to the fissure, inviting visitors to connect with the geological formations.

Structural Elements

Inspiration for the tower comes from traditional Icelandic architecture. Its design reflects the characteristics of local roofs, promoting a connection to the cultural heritage of the region. The two triangular sections of the tower are connected horizontally, enhancing the sense of unity despite their distinct forms. Vertical columns stabilize the structure, ensuring a secure foundation while allowing for its elevated presence above the ground.

Materiality

The choice of materials for the structure focuses on their practicality and visual integration with the environment. The exterior is clad in sheet metal, which provides a uniform appearance that blends with the natural landscape. Inside, polycarbonate panels allow natural light to filter through, creating a sense of openness and inviting the views from outside into the interior spaces.

Visitor Experience

An open floor grate serves as the main circulation route, guiding visitors into the structure while offering views of the fissure and the landscape beyond. The internal layout includes waiting areas, offices, and observation platforms to accommodate the needs of visitors. Bridges link the two sections of the tower, providing different perspectives of the geological features, enriching the exploration experience.

The design of the Jafnvægi Tower connects visitors to the geological history of the Icelandic landscape. It creates a dialogue between the built structure and the natural environment. The interplay of light, space, and structure offers an engaging experience that reflects the relationship between nature and design.

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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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