Get inspired!

17,725 architecture projects

Learn from past Buildner architecture competition participants through our extensive project library, curated over more than 15 years!

Pumice Walls Crafted at the Intersection of Tectonic Plates

Authors:
Micah Sexton, Emily Sexton
Pumice Walls Crafted at the Intersection of Tectonic Plates
Explore the full project presentation!
Subscribers only
Constructed with pumice walls at the tectonic intersection of Eurasia and North America, the tower serves as a visitor center that enhances engagement with the geothermal landscape of Grjótagjá.
5 key facts about this project
01
Constructed directly on the fault line between the Eurasian and North American tectonic plates.
02
Utilizes pumice-based concrete for both structural integrity and ecological sensitivity.
03
Includes a private bath cave that integrates with the natural geothermal landscape.
04
Features a multi-functional visitor center with an observation deck overlooking geothermal pools.
05
Incorporates interpretive signage to educate visitors about the site's geological history.

The Iceland Cave Tower is located at Grjótagjá, a site known for its unique geological features like volcanic rock and geothermal pools. Positioned along the fault line between the Eurasian and North American tectonic plates, the tower serves as a monument that represents the connection of these two landmasses. The design highlights a relationship with nature, inviting visitors to experience the landscape while providing essential services.

Architectural Concept

The design focuses on the geological context of the site. The tower acts as a central point that encourages exploration and interaction with the geothermal features beneath it. The form reflects the earth's elements and the geography around, creating a space that resonates with the natural forces at play.

Functional Layout

Visitor facilities are incorporated into the design, including restrooms, a visitor center, an observation deck, a café, and a private bath cave. This layout addresses the practical needs of visitors while enhancing their connection to the surrounding landscape. The visitor center serves as an information hub, positioned to provide outdoor seating that offers views of the geological formations, allowing patrons to enjoy both the architecture and the scenery.

Materiality and Construction

Pumice-based concrete was chosen for the tower's construction, demonstrating a focus on durability and ecological considerations. The overlapping scale walls add structural strength while echoing the natural shapes in the environment. This material choice reflects a commitment to sustainability and an awareness of the site's characteristics.

Design Details

Careful planning has gone into the circulation paths that allow visitors to navigate the site. These paths guide visitors while featuring interpretative signage that explains the history and formation of Grjótagjá. This approach creates a narrative that connects the building to its geological context, enhancing the visitor experience. The design underscores the importance of the geothermal pools, focusing on both engagement and education through the architecture.

Noticed a mistake?
Highlight the text and click on
Noticed a mistake

Enter an open architecture
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

`
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

Media, partners and clients

To view this project in detail,
please log in with your
Architects’ Network Plus account.
Subscription instantly unlocks all the architecture projects plus other member-only benefits:
  • Access the 17,725 Concept Library
  • Professional tools including file transfer, email, portfolio management, and more
Register now
Already a member? Log in

This website uses cookies to improve user experience and gather usage statistics.

More information is available in our Privacy & Cookie policy