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Perforated Shelters of Recycled Ocean-Plastic by Geothermal Caves

Authors:
Balázs Fürtön, Zoltán Nádasdi, Eszter Rieszné horváth, Márta Molnár
Perforated Shelters of Recycled Ocean-Plastic by Geothermal Caves

Project in-detail

Constructed from perforated, corrugated metal panels and recycled ocean-plastic furnishings, the cave tower offers a sustainable shelter and café experience while fostering a connection with the geological features of Lake Mývatn.
5 key facts about this project
01
Perforated metal panels enhance weather resistance while providing dynamic visual engagement.
02
Furnishings crafted from recycled ocean-waste plastic promote sustainability.
03
The circular design offers panoramic views of the surrounding caves and landscape.
04
Modular hiking paths integrate seamlessly with the natural terrain for improved accessibility.
05
Geothermal energy systems ensure efficient heating and minimal environmental impact.

The design located near the Grjótagjá caves at Lake Mývatn emphasizes a close relationship between built and natural environments. The cave tower serves multiple functions, including a café, a viewpoint, and a shelter for visitors. Its design aims to fit into the landscape while providing an improved experience for those exploring the unique geological features of the area.

Structural Form and Aesthetics

The cave tower is characterized by a round shape that blends with the contours of the surrounding landscape. This design symbolizes a connection to the geological traits of the region. The placement of the tower is intentional, inviting visitors as they approach and creating a welcoming presence in the natural setting.

Spatial Organization

Inside the building, the layout is organized around a central axis, focusing on symmetry and flow. Visitors enter from a designated parking area, smoothly transitioning into a spacious environment. The arrangement is designed to foster interactions among visitors, especially around the central café counter, encouraging a sense of connection and community.

Material Considerations

The choice of materials significantly contributes to the design’s character. Perforated, corrugated metal panels are used on the exterior, providing durability and visual interest. These panels allow the building to respond to changes in weather and light, enhancing its relationship with nature. Additionally, furnishings made from recycled ocean-waste plastic further promote sustainability and responsible design practices.

Sustainability Features

The building incorporates multiple energy-saving systems, including geothermal energy for heating and a VAV system with heat recovery for air conditioning. Renewable energy sources, such as small wind turbines and solar panels, also contribute to minimizing environmental impact. These systems work together to create an efficient building that prioritizes eco-friendly solutions.

The cave tower includes strategically placed windows that frame views of the stunning landscape, inviting visitors to enjoy the scenery while providing shelter from the elements.

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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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Buildner's Unbuilt Award 2025
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