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Exploring Tensegrity in a Polycarbonate Observation Tower Overlooking a Geological Fissure

Author:
Matthias Pabst
Exploring Tensegrity in a Polycarbonate Observation Tower Overlooking a Geological Fissure
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Rising above a geological fissure, the polycarbonate observation tower and grounded guest house showcase a unique interplay of tensegrity and local stone elements, providing visitors with an immersive experience of Iceland's natural landscape.
5 key facts about this project
01
Rising observation tower mimics local cave formations.
02
Spiral staircase framed by chains enhances vertical experience.
03
Guest house integrates large, locally sourced stones.
04
Polycarbonate sheets provide light and thermal insulation.
05
Design emphasizes accessibility without disrupting nature.

The Iceland Cave Tower is situated near a geological fissure and consists of a guest house and an observation tower. The design emphasizes a strong connection with the surrounding landscape while enhancing visitors' experiences of the area's unique geological features. Central to the concept is “Tension and Integrity,” which explores the balance between stability and dynamic form.

Observation Tower

The observation tower features a delicate form that reaches upward, symbolizing aspirations and a link to the sky. Its base is designed to resemble local cave formations, creating a unique entry point for visitors. A balcony at the top offers expansive views of the continental plates, and the spiral staircase, framed by chains, reinforces the design's emphasis on verticality. This element fosters a sense of height and perspective, inviting visitors to connect with their surroundings.

Guest House

In contrast to the tower's elevation, the guest house is a solid structure, focusing on shelter and a connection to the landscape. The open layout encourages fluid interactions between inside and outside, effectively merging the two spaces. Large stones are integrated into the design, providing both artistic elements and functional uses within the interior, making the space feel grounded while maintaining a connection to nature.

Materiality

The design employs specific materials thoughtfully chosen to support the overall vision. Polycarbonate sheets form the thermal envelope of the guest house, allowing light to filter in while also providing insulation. A wooden framework adds stability and structure, while the use of metal plates for finishing touches completes the construction. Together, these materials enhance the connection to the natural environment.

Design Integration

Accessibility for visitors is a key aspect of the design, with the placement of both structures carefully considered within the landscape. The contrasting forms of the upward-reaching tower and the stable guest house offer distinct yet complementary experiences. Integrating local geological features creates a stronger bond with the surrounding area, showcasing how built forms can work alongside nature. The large stones within the guest house act as clear reminders of the landscape's influence, highlighting the project's commitment to local identity and context.

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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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100,000€ Prize / 2025 ideas COMPETITION
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