Get inspired!

17,725 architecture projects

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

Fissured Corten Structure Integrating Geothermal Elements Within Icelandic Landscape

Authors:
Ilaria Giuliano, Giorgia Pedrielli, Nicole Costantini, Mariapia Basile
Fissured Corten Structure Integrating Geothermal Elements Within Icelandic Landscape
Explore the full project presentation!
Subscribers only
The observation tower employs a fissured design and corten steel to echo the region's geological features while integrating geothermal technology, serving as a visitor center in the Icelandic landscape.
5 key facts about this project
01
The observation tower is designed to mimic natural fissures in the landscape.
02
Corten steel is employed for its weathering properties, enhancing the building's durability.
03
Geothermal energy is utilized for efficient heating and cooling throughout the facility.
04
Paths lead directly to the Kvennagjà cave, linking nature with the visitor experience.
05
The structure is fully accessible, accommodating visitors of all abilities.

The project is located in the unique landscape of Grjótagjà, which is marked by its significant geological features. The goal is to enhance visitor engagement with this natural environment through a design that harmonizes with the setting. The layout includes various functional spaces, such as access areas, a parking facility, service buildings, and a central observation tower. The overall design concept aligns closely with the tectonic characteristics of the landscape, allowing the architecture to work alongside nature rather than compete with it.

Observation Tower

A key element in the design is the observation tower named Rifa, a term that translates to "fissure" in Icelandic. This tower serves as a focal point for visitors, inviting them to experience the landscape from an elevated perspective. The entryway reflects the natural fissures found in the area, creating an immediate connection to the geological history. The tower allows visitors to observe the surrounding beauty, linking the architectural experience to the landscape itself.

Accessibility Framework

Accessibility is an important consideration in the design. The project features facilities such as changing rooms and relaxation areas strategically placed to serve a broad range of visitors. This thoughtful arrangement ensures that everyone can easily access various parts of the site. By focusing on inclusivity, the design encourages individuals and families to explore and enjoy the natural surroundings comfortably.

Pathways and Connectivity

The pathways within the design are both modular and lightweight. They guide visitors to important areas, including the bathing location at Kvennagjà cave. These paths are designed to blend into the landscape while remaining functional. By maintaining clear routes, visitors can easily navigate the space and appreciate the surrounding natural beauty. The design promotes engagement with the site, allowing exploration without unnecessary barriers.

Material Considerations

The materials chosen for the project include reinforced concrete and corten steel. These materials contribute to the structural integrity of the observation tower while maintaining a connection to the geological context. Glass elements are also used to enhance the experience, allowing for expansive views of the outdoors. In addition, energy-efficient solutions, such as heat pumps and vertical geothermal probes, reflect a commitment to environmental considerations in the design.

The observation tower’s entry, characterized by its fissured form, welcomes visitors into a space that echoes the landscape's natural dynamics. It invites exploration and connection, bridging the gap between architecture and the surrounding environment.

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

Enter an open architecture
competition now

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 Next House: USA
The Next House: USA
20,000 USD Prize
The Architect's 
Chair
The Architect's Chair
Take a seat and make a statement! Edition #5
Kinderspace
Kinderspace
Architecture for Children’s Development #3
The Architect’s 
Stair
The Architect’s Stair
Take a step and make a statement! Edition #3

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
The Next House: USA

Design the next suburban home for the USA

20,000 USD Prize ideas COMPETITION
Prize Monetary award
Eligibility Open to all
Early bird registration deadline 19 November 2025
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

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
Kinderspace

Design a kindergarten of tomorrow

Architecture for Children’s Development #3 ideas COMPETITION
Prize Monetary award
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
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
Advance registration deadline 15 January 2026

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