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Circular Greenhouse Restaurant Built with Concrete and Glass in a Volcanic Landscape

Authors:
Lisa-marie Deransy, Bachir Souadji
Circular Greenhouse Restaurant Built with Concrete and Glass in a Volcanic Landscape
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Set against the backdrop of Iceland's volcanic landscape, the circular design utilizes concrete and expansive glass to create a greenhouse restaurant that fosters a direct connection between diners and their locally sourced meal origins.
5 key facts about this project
01
Designed to blend with the volcanic terrain, the structure partially integrates into the earth, enhancing site harmony.
02
Extensive use of glass invites natural light while offering unobstructed views of the surrounding landscape.
03
The greenhouse component allows for on-site cultivation of ingredients, promoting a farm-to-table dining concept.
04
A circular floor plan encourages social interaction and directs attention to the natural surroundings.
05
Ramped access creates a welcoming entrance, facilitating smooth transitions from the outdoor environment to the dining area.

Hverfjall II is an architectural project designed as a greenhouse restaurant located near the Hverfjall volcano in Iceland. The project integrates the dining experience with the surrounding volcanic landscape, emphasizing transparency and a strong connection to the natural environment. The circular structure facilitates an immersive experience, allowing patrons to engage with the site both visually and physically. This design embodies the concept of bringing the outdoors inside, creating an environment that enhances the culinary experience through visibility and accessibility to the landscape.

The design features two distinct interconnected rings: an external dining area that provides expansive views and an internal functional space containing necessary service areas. The circular form directs attention outward, encouraging visitors to appreciate the geological context of their surroundings. With the structure partially submerged into the volcanic earth, the approach creates an engaging journey from the access point to the interior spaces. The gentle descent into the building enhances the connection between the architecture and the unique landscape it occupies.

Unique to Hverfjall II is its emphasis on materiality, utilizing concrete for structural support, glass for transparency and natural light, and steel for the structural framework. This combination allows for an architecture that is durable and low maintenance, while also being visually light and unobtrusive in the landscape. The extensive use of glass not only blurs the lines between indoor and outdoor spaces but also creates dynamic lighting conditions that fluctuate throughout the day, enhancing the sensory experience of dining amidst nature.

Another distinguishing feature of the project lies in its culinary philosophy, promoting local agriculture and sustainability. The greenhouse component allows for on-site growing of vegetables, reinforcing a direct link between food production and consumption. Diners have the opportunity to witness the growth of ingredients before they are harvested for meals, making the dining experience educational as well as enjoyable.

The architectural design effectively encapsulates the ideals of sustainability and locality, integrating the building into its environment while providing a unique and functional space for visitors. For a deeper understanding of the architectural ideas that drive this project, including architectural plans, sections, and designs, explore the project presentation further.

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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 €
Eligibility Open to all
Final registration deadline 30 October 2025

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