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Corten Steel Observation Tower Embracing Geothermal Energy and Natural Landscapes

Authors:
Teresa Cabrera Arzoz, Olga Sánchez Moreno, Ignacio Ruiz Del Portal Pauner
Corten Steel Observation Tower Embracing Geothermal Energy and Natural Landscapes
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Standing 11 meters tall and constructed with corten steel, the observation tower draws upon geothermal principles and rainwater catchment systems to harmonize with the rugged Icelandic landscape while serving as a vital community gathering space.
5 key facts about this project
01
Observation tower reaches 11 meters in height, providing expansive views of the rugged terrain.
02
Utilizes corten steel for durability against harsh weather conditions typical in Iceland.
03
Incorporates a geothermal energy system to enhance sustainability and resource efficiency.
04
Features rainwater catchment systems for efficient water use across the facility.
05
Two pavilions serve distinct functions, promoting community interaction and resource accessibility.

The Iceland Cave Tower project is situated in the expansive landscape of Iceland. It offers an observation point and serves as a community hub. The design revolves around an observation tower that captures the attention of anyone passing by. Located along a roadway, it interacts meaningfully with the area's geological features. The project also includes two pavilions that enhance the overall function, providing space for various activities while inviting interaction.

Observation Tower

The observation tower reaches a height of 11 meters, featuring three distinct levels. Each level is designed to offer different views of the surrounding terrain. The lower levels keep close connections to the natural features, while the upper level provides wide-ranging vistas of Iceland's rugged beauty. Attention to accessibility ensures that all visitors can explore the space without difficulty. The presence of barrier-free access and an elevator promotes inclusivity.

Pavilion Spaces

Two pavilions flank the observation tower, each with specific roles. One pavilion serves as an information center, including areas for a cafeteria, office space, and restrooms. Rainwater catchment systems are part of the design, which aids in resource conservation. Surrounding pathways extend from the tower, creating a lively public space that encourages movement and community engagement.

Bioclimatic Considerations

Bioclimatic strategies play a key role in the design, contributing to energy efficiency and comfort. Special glazing reduces heat loss while allowing sunlight to enter, maintaining stable temperatures indoors. The steeply pitched roofs are effective at managing rain and snow, helping to avoid ice dams. Extended overhangs provide needed shade during summer and allow sunlight in during winter.

Materials and Modularity

Materials are chosen to reflect the local context. The project incorporates wood sourced from the nearby area, supporting traditional Icelandic building methods. Corten steel sheets are used for the exterior, providing protection against the local climate. A modular approach characterizes the design of pathways, making construction simpler while maintaining a unified look. Each module has angled designs that create a pleasing connection between the built structures and the landscape.

The design culminates in a viewing platform that extends outward, fostering a feeling of openness. Visitors are encouraged to immerse themselves in the expansive views of the Icelandic landscape, creating a strong connection between people and nature.

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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.

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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