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Geothermal Observation Platforms with Basaltic Concrete and Corten Steel Elements

Authors:
Andrea Sibaja matamoros, Douglas Castro alfaro, Maria josé Zúñiga blanco, Maria fernanda Matamoros araya
Geothermal Observation Platforms with Basaltic Concrete and Corten Steel Elements

Project in-detail

The integration of geothermal systems, basaltic concrete, and corten steel defines a facility designed for observation and interaction with the striking geological features of Iceland's Grjótagjá caves.
5 key facts about this project
01
Observation platforms designed to enhance views of the Mid-Atlantic Ridge.
02
Constructed using locally sourced basaltic concrete for environmental integration.
03
Features geothermal energy systems to minimize ecological impact.
04
Includes a facility for water treatment and energy management.
05
Innovative use of corten steel provides durability in harsh weather conditions.

The Iceland Cave Tower stands within the distinctive volcanic landscape of the Grjótagjá caves in Iceland. It serves as a space for visitors to observe and engage with the striking geological features of the area. The design concept revolves around the relationship between the structure and the environment, presenting a physical connection to the geological processes that have shaped this region.

Design Concept

The concept of the Iceland Cave Tower draws inspiration from the geological formations found in the area. The structure resembles a welding line, suggesting a connection between two land masses. A diagonal element is key to the design, highlighting the vertical nature of the geological fault. This choice guides the attention of visitors toward the captivating landscape, making the experience of viewing the Mid-Atlantic Ridge more engaging.

Functionality and Visitor Experience

The layout incorporates various functional spaces that enhance the visitor experience. Features include observation platforms, a café, waiting areas, and changing rooms. This arrangement promotes smooth movement throughout the site, allowing people to easily navigate between different areas. Public and private trails lead visitors from parking spaces to the main entrance, ensuring accessibility while respecting the natural contours of the land.

Sustainability Considerations

Sustainability is an important aspect of the design. An engine house, which focuses on managing water and energy, illustrates this commitment. It uses systems like biodigesters and geothermal energy solutions. By integrating these features, the design aims to minimize environmental impact, showcasing a responsible approach to architecture amidst nature.

Materials

The materials selected for the Iceland Cave Tower include basaltic concrete and laminated glass. These are chosen to blend with the surrounding landscape. In addition, permeable corten steel and a recycled aluminum structure support the project’s sustainable goals. The material choices reflect a focus on durability and environmental responsibility.

Large observation platforms provide expansive views of the surrounding geological formations, inviting visitors to appreciate the area's unique beauty.

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MICROHOME 10: Celebrating Small-Scale Living with €100,000 Prize Fund and Kingspan’s Innovation

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Competition organisers

The MICROHOME 10 competition invites participants to submit visionary designs for off-grid, modular microhomes that push the limits of sustainable, small-scale living. Organised by Buildner in partnership with Kingspan and Hapi Homes, this tenth edition sets the challenge of designing a dwelling for two people within a maximum floor area of 25 m², encouraging bold solutions adaptable to any urban or rural location. The competition continues Buildner’s mission to foster innovative approaches to compact, energy-efficient housing that can address pressing global challenges.

This year’s edition offers a generous total prize fund of €100,000, including the Kingspan Award for designs that integrate high-performance Kingspan products and the Hapi Homes Award for a project selected for real-world construction. In addition to cash prizes, the winners gain international exposure through Buildner’s media partnerships, publications, and a dedicated MICROHOME magazine, further amplifying their ideas to the wider architectural community.

Key dates for MICROHOME 10 include the closing date for registration on 25 September 2025, the submission deadline on 29 October 2025 (11:59 p.m. London time), and the announcement of winners on 9 December 2025. These milestones ensure participants have clear timelines to develop and present their concepts, with early registration discounts available to support students and emerging designers worldwide.

MICROHOME

Design a new small-scale home concept in the 10th edition of MICROHOME — 100,000 € prize + construction

100,000 € Prize Fund / Kingpsan Edition #10 ideas COMPETITION
Prize 100,000 € + Potential realisation
Eligibility Open to all
Final registration deadline 25 September 2025

Enter an open architecture
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