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Basalt-Clad Watchtower Embracing Geothermal Landscapes with Subterranean Spaces

Author:
Harrison Burton
Basalt-Clad Watchtower Embracing Geothermal Landscapes with Subterranean Spaces

Project in-detail

A slanted basalt-clad structure draws visitors into the geothermal landscape of Grjótagjá, providing an immersive experience and multifunctional space that fosters community engagement.
5 key facts about this project
01
Unique slanted architectural form enhances wind resistance.
02
Dark basalt cladding mirrors surrounding geological features.
03
Subterranean facilities provide essential services while minimizing visual impact.
04
Pathway design encourages tactile interaction with the landscape.
05
Multi-functional areas promote community engagement and visitor experience.

The Wall in Grjótagjá, Iceland, stands as a watchtower designed to fit naturally within a landscape that features geothermal hot springs and deep fissures. Its purpose is to offer a gathering place for visitors, allowing them to take in the unique scenery while also fostering a sense of community and reflection. The design aims to enhance the experience of being in such a remarkable environment while addressing the need for sustainable tourism.

Structural Design and Integration

The slanted wall of the structure provides both a functional and aesthetic role. It leans over the vast landscape of Vogagja, creating a visual connection to the geological formations nearby. Visitors encounter a defined pathway that guides them up and around the wall. This journey encourages them to engage physically with the architecture and appreciate the surrounding beauty.



Materiality and Construction

Construction utilizes a strong steel frame to ensure the stability of the structure. The outer layer is covered in dark basalt rock, a material that matches the local geography and allows the building to blend in with its surroundings. In addition, concrete is used for the underground spaces, offering durability, while the roof features artificially rusted metal, contributing to a cohesive overall design.



Visitor Experience and Functionality

Inside the underground area, visitors find a well-organized space that enhances their interaction with the wall. As they descend, they are surrounded by the structure, enriching their connection to both the architecture and the environment. Essential services, such as an office and café, are thoughtfully integrated, ensuring that practical needs are met along with visitor enjoyment.



Environmental Considerations

The design pays careful attention to environmental factors, especially wind. The shape of the wall and careful placement of openings help to manage wind pressure effectively. This consideration allows for comfort and stability, ensuring that the structure remains functional and inviting.



The elements of this design come together to create a unique experience. The pathway encourages visitors to touch the rock surfaces, fostering a deeper connection between the built environment and the natural landscape.

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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
competition now

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