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Rainwater Harvesting Green Roof with Geothermal Energy Integration and Scenic Viewing Platform

Author:
Konrad Brzykcy
Rainwater Harvesting Green Roof with Geothermal Energy Integration and Scenic Viewing Platform

Project in-detail

A green roof designed for rainwater harvesting and integrated geothermal energy systems supports a viewing platform that enhances visitor engagement with the dramatic landscape near Grjótagjá caves.
5 key facts about this project
01
Green roof system captures rainwater for restroom and café use.
02
Geothermal energy is harnessed for sustainable heating.
03
Viewing platform offers unobstructed panoramic views of volcanic landscapes.
04
Pathways connect visitor amenities directly to cave entrances.
05
Local craftsmanship is showcased in information stands and art displays.

The Iceland Cave Tower is positioned between the North American Plate and the Eurasian Plate, near Grjótagjá, a group of three caves located close to Lake Mývatn in northern Iceland. This structure serves as an important stop for tourists exploring the caves, featuring a viewing tower and a platform that enhance the experience by offering wide views of the surrounding volcanic landscape. The design centers around integrating the building into the natural environment, allowing visitors to connect with the geological features of the area while enjoying a sense of calm.

Architectural Layout

The layout of the Iceland Cave Tower emphasizes accessibility and visitor comfort. Upon entering, guests encounter several key amenities, including information stands that display educational materials such as posters and flyers, along with artworks created by local craftspeople. The presence of waiting areas and a café invites visitors to relax, encouraging a leisurely pace and enhancing their engagement with the surroundings.

Functional Facilities

Alongside visitor amenities, the design incorporates essential facilities like restrooms, storage areas, and administrative spaces. This thoughtful approach meets the diverse needs of both tourists and staff, ensuring that the site operates smoothly. Connecting pathways lead from the visitor center to parking areas and the entrances to Karlagja (Men Cave) and Kvennagja (Women Cave), making it easier for guests to navigate the area.

Sustainability Measures

In a commitment to sustainability, the design features a green roof that captures and stores rainwater. This harvested water will be used in the restrooms and café, promoting efficient use of natural resources. Additionally, solar panels on the flat roofs harness renewable energy, while geothermal heat pumps tap into the local energy sources, supporting the building’s overall sustainability.

Integration with Environment

The choice of colors and architectural forms is designed to complement the natural landscape, ensuring the building fits visually into its surroundings. The viewing tower offers unobstructed sightlines, allowing visitors to appreciate the stark beauty of the Icelandic terrain. This connection with the landscape is a crucial aspect of the design, encouraging a deeper appreciation of the unique geological features nearby.

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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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