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Engraved Concrete Disk Overlooking a Volcanic Crater with Reused Timber Steps

Authors:
Gloria Tombolato, Luca Piazzon
Engraved Concrete Disk Overlooking a Volcanic Crater with Reused Timber Steps
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An engraved concrete disk, adorned with local aggregates and framed by reused timber steps, extends from the edge of Hverfjall crater, creating an observatory that invites reflection on the surrounding volcanic landscape.
5 key facts about this project
01
Engraved surface illustrates the volcanic fault line of Iceland.
02
Circular platform shape echoes the contours of the Hverfjall crater.
03
Reused timber steps integrate traditional Icelandic construction methods.
04
Handrail design resembles the movement of the northern lights.
05
Concrete aggregates are sourced locally to match surrounding terrain.

The project located at Hverfjall crater serves as an observatory designed for contemplation, creating a space where visitors can connect with the natural surroundings. Positioned on the edge of a volcanic crater that formed around 2,500 years ago, the design merges functionality with the dramatic features of the Dimmuborgir Lava Fields, enhancing the experience of those who come to observe the landscape.

Design Concept

At the heart of the design is a disk-shaped platform encircling an area dedicated to observation. This form closely follows the contours of the crater, establishing a dialogue between the architecture and the environment. The circular shape encourages visitors to immerse themselves in the geological history and beauty of the landscape, promoting a deeper understanding of the site.

Material Choices

The project utilizes materials that are in harmony with the local context. The platform is made from reinforced concrete, incorporating aggregates that mirror the tones of the land. This material choice fosters a visual connection between the structure and its surroundings. Additionally, a wooden step crafted from reused timber reflects traditional construction practices, emphasizing principles of sustainability and the importance of local resources.

Surface Details

Surface elements play a key role in offering insight into the landscape’s narrative. An engraving on the disk highlights the volcanic fault that runs through Iceland, linking the observatory to the geological history of the area. This design detail educates visitors about the environment, enhancing their experience and sense of place as they engage with the site.

Interaction with Landscape

A significant consideration in the design is the interaction between the platform and the ground below. The wooden step alters the typical expectations of form, creating an engaging interface with the landscape. This thoughtful approach encourages visitors to physically engage with their surroundings, inviting them to explore the site more closely.

Complementing the platform is a handrail made of painted fine-grain steel. The handrail consists of straight elements that resemble the movement of the northern lights, adding to the visual appeal. It serves a practical purpose while also enhancing the overall experience, highlighting the connection between the built environment and the natural beauty that surrounds it.

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

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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 €
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Final registration deadline 30 October 2025

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