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Iceberg-Inspired Tower with Ventilated Glass Overlooking Grjótagjá Caves

Authors:
Giovanni Giulioni, Daniele Garofalo
Iceberg-Inspired Tower with Ventilated Glass Overlooking Grjótagjá Caves
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Rising like an iceberg, the tower utilizes a ventilated glass facade to create a striking observation point over the Grjótagjá caves, offering visitors a unique interaction with Iceland's dramatic landscape.
5 key facts about this project
01
Rising form resembles an iceberg, reflecting Iceland's natural landscape.
02
Panoramic views of Grjótagjá caves enhance visitor experience.
03
Ventilated glass facade improves energy efficiency while maximizing light.
04
Designed to harmonize with topography, integrating seamlessly with the site.
05
Features a unique metal mesh flooring for transparency and structural support.

The Iceland Cave Tower enhances the connection between the built environment and the unique geological features of Iceland, specifically overlooking the Grjótagjá caves. The structure serves multiple purposes, providing spaces for a bar, storage, a hall, and restrooms. The design concept draws on the imagery of an iceberg, highlighting both visible and hidden dimensions of the landscape, with the tower’s tall form rising above while symbolically protecting the depths below.

Design Concept

This design integrates closely with the landscape. The shape of the tower and the arrangement of its spaces are influenced by the surrounding topography. The iceberg metaphor not only captures the essence of Iceland’s environment but also encourages a dialogue between the structure and the natural site, strengthening the link between nature and human activity.

Functional Layout

The ground floor features several areas: a bar covering 30 square meters, a 14 square meter storage space, a 28 square meter hall, and a restroom of 15 square meters. The layout is carefully planned to maximize visitor engagement and enhance interaction with the landscape. By providing clear views of the caves, the design enriches the visitor experience and fosters appreciation for the site’s natural beauty.

Materiality and Aesthetics

The project uses a ventilated glass facade and metal mesh flooring, which allow natural light to fill the space while ensuring adequate structural support. The glass facade emphasizes the views of the landscape, while also improving energy efficiency. The metal mesh flooring complements the overall design and helps to anchor the tower within its environment.

Structural Integration

The first floor features a west facade that aligns with the contours of the landscape, ensuring a cohesive connection between the tower and its surroundings. This design choice allows the tower to have a subdued presence while still serving as an observation point for visitors. By carefully integrating architectural elements with the natural features of the site, the design deepens guests' understanding of the geological context.

The Iceland Cave Tower balances practical function and thoughtful design. Through its arrangement of spaces and choice of materials, it enhances the experience of the surrounding natural environment while emphasizing a clear architectural narrative.

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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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