Get inspired!

17,725 architecture projects

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

Charred Hardwood Roofs Bridging Geological Fissures in a Volcanic Landscape

Authors:
Ramiro Carro, Santiago Perez, Facundo Hernandez, Juliana Lareu
Charred Hardwood Roofs Bridging Geological Fissures in a Volcanic Landscape
Explore the full project presentation!
Subscribers only
Charred hardwood roofs interconnect dual caves, bridging the geological divide between tectonic plates while providing a multifaceted visitor experience within Iceland's volcanic landscape.
5 key facts about this project
01
Charred hardwood shingles provide both durability and a distinct visual texture.
02
The design captures and highlights the geological fissure between two tectonic plates.
03
Modular components allow flexibility for future expansion along the landscape.
04
Strategic roof placement enhances interaction with the surrounding volcanic features.
05
The structure integrates natural lighting to enhance visitor experience in caves.

The Iceland Cave Tower project is located in a unique setting at the intersection of the Eurasian and North American tectonic plates. The design explores the concepts of hiding and peeking, encouraging visitors to engage with the natural landscape. Three interconnected roofs link two caves, creating a cohesive structure that enhances the experience of the surrounding geological features.

Design Concept

At the heart of the design are three wooden roofs that serve to connect the two continental contexts. These roofs do more than provide shelter; they also define spaces and guide movement throughout the site. Their arrangement emphasizes the geological crack, inviting visitors to explore the relationship between architecture and nature.



Roof Structures

The Karlagjá roof acts as the main access point for visitors, leading them toward several programmatic modules. These modules facilitate access to the largest cave and the tower, promoting exploration through clearly defined pathways. In contrast, the Kvennagjá roof offers a quieter experience within the smaller cave, catering to those seeking a more intimate space.



Geological Integration

The Grjótagja roof is strategically positioned on the North American plate, taking advantage of the elevation difference between the tectonic plates. This placement not only creates a visual focal point but also provides structural stability against Iceland’s challenging weather. The design respects and responds to its environment, creating a thoughtful presence within the volcanic landscape.



Material Considerations

Materials play a key role in the project, linking it to the surrounding area. The roofs are constructed using prefabricated wood panels, which allow for efficient construction while maintaining a connection to the landscape. Charred hardwood strips enhance both the appearance and durability of the roofs. The timber structure and metal piles further strengthen the overall design.



The modular nature of the design allows for growth and adaptation over time. Structures can evolve along the geological crack, reflecting the ongoing changes in the landscape. This aspect of the project emphasizes the relationship between architecture and the environment, highlighting a commitment to respecting the natural setting.

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

Enter an open architecture
competition now

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
The Home of 
Shadows
The Home of Shadows
The light studies. Edition #4
The Architect's 
Chair
The Architect's Chair
Take a seat and make a statement! Edition #5

The Buildner’s Unbuilt Award 2025: Celebrating Architectural Creativity and Visionary Unbuilt Designs with a Total Prize Fund of €100,000

`
Competition organisers

The Buildner’s Unbuilt Award 2025 is an international architecture competition dedicated to recognizing and celebrating the value of unrealized architectural designs. It invites architects, designers, and students worldwide to submit visionary projects that have not yet been constructed, highlighting the power of ideas and the creativity behind the design process. By focusing on unbuilt work, the competition aims to bring forward concepts that shape the future of architecture and push the boundaries of the profession. 

Participants can compete in three categories based on project scale: Small Wonders (up to 100 m²), Medium Marvels (101–999 m²), and Large Visions (over 1,000 m²). Each category winner will receive €20,000, and additional prizes include honorable mentions, student awards, and a special Best Presentation Award. Winning projects will gain significant international exposure through Buildner’s publicity campaign and a feature article on ArchDaily, providing a unique opportunity to showcase creative ideas to a global audience. 

The Buildner’s Unbuilt Award 2025 encourages entrants to submit any type of unbuilt project, from conceptual visions to detailed designs, celebrating bold innovation without the constraints of realization. Important deadlines: registration closes on October 30, 2025; submissions are due by November 20, 2025; winners will be announced on December 17, 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

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
new
Iceland 
Slow Sauna

Design slow sauna in Iceland

project COMPETITION
Prize Monetary award
Eligibility Open to all
Early bird registration deadline 26 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
new
Pavilion Atlas 2026

Design a story of your country

ideas COMPETITION
Prize Monetary award
Eligibility Open to all
Early bird registration deadline 21 January 2026

Recurring architecture competitions

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
new
The Home of 
Shadows

Design a home with no artificial lighting

The light studies. Edition #4 ideas COMPETITION
Prize Monetary award
Eligibility OPEN TO ALL
Early bird registration deadline 5 November 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
new
The Architect's 
Chair

Take a seat and make a statement!

Take a seat and make a statement! Edition #5 ideas COMPETITION
Prize Monetary award
Eligibility Open to all
Early bird registration deadline 20 November 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
Final registration deadline 26 November 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
Final registration deadline 27 November 2025
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
Advance registration deadline 3 December 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