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Rammed Earth Structure Embracing Geothermal Features for a Wellness Retreat

Rammed Earth Structure Embracing Geothermal Features for a Wellness Retreat
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Crafted from rammed earth and designed to integrate seamlessly with geothermal features, the structure serves as a dedicated wellness retreat that fosters a deep connection with its natural surroundings.
5 key facts about this project
01
Crafted from locally sourced rammed earth, enhancing sustainability and thermal performance.
02
Geothermal heating integrated into the design for energy-efficient climate control.
03
Curvilinear structure harmonizes with the natural topography of the landscape.
04
Strategic use of glass provides unobstructed views of the Northern Lights.
05
Private treatment areas designed for immersive nature experiences, prioritizing user tranquility.

### Overview

Caldera: The Boiling Pot is located in a scenic Nordic region characterized by geothermal features. The design aims to create a harmonious relationship with the surrounding landscape, emphasizing relaxation and intimacy. The architecture draws inspiration from the elemental aspects of the sky, mountains, and craters, all influencing its form to establish a connection between visitors and the natural environment.

### Architectural Form and Spatial Organization

The building's design features flowing, organic shapes that reflect the sinuous lines of the terrain. Curvilinear forms are employed to foster tranquility, while the spatial arrangement is meticulously crafted to promote interaction among visitors. The public areas are thoughtfully articulated, enhancing circulation and enabling various visual and experiential connections between indoor and outdoor spaces. Key facilities, including a brewery, treatment rooms, and relaxation lounges, are integrated to create a comprehensive wellness environment.

### Material Selection and Sustainability

Materiality plays a crucial role in reinforcing the building's environmental ethos. Hand-shaped, rammed-earth walls provide warmth and a tactile quality, fostering a connection to the earth. Wood is utilized in structural elements and interior finishes to enhance warmth and invite nature indoors. Additionally, glass is strategically incorporated to maximize natural light and views, while metal and concrete are used in structural cores to ensure durability. This careful selection of materials supports sustainability while maintaining the architectural integrity of the design.

The architecture is designed to evoke a meditative experience by incorporating delicate connections between interior spaces and the surrounding landscape, thus inviting exploration and engagement.

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competition now

Denver Affordable Housing Challenge
Denver Affordable Housing Challenge
Affordable Housing Series 19th Edition
The Architect's 
Chair
The Architect's Chair
Take a seat and make a statement! Edition #4
MICROHOME
MICROHOME
100,000 € Prize Fund / Kingpsan Edition #10
The Architect’s 
Stair
The Architect’s Stair
Take a step and make a statement! Edition #3
Kinderspace
Kinderspace
Architecture for Children’s Development #3
Buildner's Unbuilt Award 2025
Buildner's Unbuilt Award 2025
100,000€ Prize / 2025

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

Open architecture competitions

  • Closest deadline first
  • Project competitions first
    Selected winning projects have the potential to be constructed
  • Ideas competitions
    Experimental competitions with the focus on pushing the boundaries of creativity
Denver Affordable Housing Challenge

AIA (American Institute of Architects) invites you to design affordable housing in Denver

Affordable Housing Series 19th Edition ideas COMPETITION
Prize Monetary award
Eligibility Open to all
Final registration deadline 18 September 2025

Recurring architecture competitions

The Architect's 
Chair

Take a seat and make a statement!

Take a seat and make a statement! Edition #4 ideas COMPETITION
Prize Monetary award
Eligibility Open to all
Final registration deadline 18 September 2025
Museum of 
Emotions

Use architecture to create different emotional states

Edition #7 ideas COMPETITION SILENT CONTEST For this competition, NO DESCRIPTION TEXT is allowed. The architecture ideas must be communicated strictly with visuals.
Prize Monetary award
Eligibility Open to all
Advance registration deadline 18 September 2025
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
new
Re:Form - 
New Life 
for Old Spaces

Choose a site—used, abandoned, or forgotten—anywhere in the world, and give it a new purpose

Edition #2 ideas COMPETITION
Prize Monetary award
Eligibility Open to all
Early bird registration deadline 2 October 2025
Hospice - 
Home for the 
Terminally ill

Design a safe and supportive space to those struggling with a terminal illness

Edition #5 ideas COMPETITION
Prize 10,000 €
Eligibility Open to all
Advance registration deadline 9 October 2025
new
The Architect’s 
Stair

Take a step and make a statement!

Take a step and make a statement! Edition #3 ideas COMPETITION
Prize Monetary award
Eligibility Open to all
Early bird registration deadline 15 October 2025
Kinderspace

Design a kindergarten of tomorrow

Architecture for Children’s Development #3 ideas COMPETITION
Prize Monetary award
Eligibility Open to all
Advance registration deadline 16 October 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
The Last 
Nuclear Bomb Memorial

Design a memorial that speaks to the cause of ending all nuclear weapons programs

Edition #6 ideas COMPETITION SILENT CONTEST For this competition, NO DESCRIPTION TEXT is allowed. The architecture ideas must be communicated strictly with visuals.
Prize Monetary award
Eligibility Open to all
Final registration deadline 13 November 2025
Concrete 
Pavilion

Design a concrete pavilion

Edition #3 ideas COMPETITION
Prize Monetary award
Eligibility Open to all
Final registration deadline 27 November 2025

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