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Floating Volumes with Soil Cement Structure Emphasizing Inverted Views of the Icelandic Landscape

Authors:
Maxime Cahu, Sophie Trigueiros
Floating Volumes with Soil Cement Structure Emphasizing Inverted Views of the Icelandic Landscape
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Comprising floating volumes and utilizing soil cement, the design captures inverted projections of the Icelandic landscape to create an immersive observation experience.
5 key facts about this project
01
Utilizes soil cement for structural stability and environmental integration.
02
Features four floating volumes designed for optimal light exposure.
03
Incorporates a camera obscura technique for dynamic image projection.
04
Provides a progression from dark to light chambers during ascent.
05
Emphasizes geothermal heating and rainwater collection for sustainability.

CAMERA ALTERNA is located in the striking basalt landscapes of Iceland, near Myvatn's lake. Serving as an observation tower, it invites visitors to re-experience the natural surroundings while exploring themes of perception and reality. The design integrates light and shadow to foster a deeper connection to the environment, transforming standard viewpoints into engaging experiences.

Architectural Concept
The main idea of CAMERA ALTERNA is centered around experiential exploration, where the structure acts as both an observation point and a sensory interface with nature. A key element of the design is the "camera obscura," which uses a dark chamber to project an inverted image of the landscape outside. This setup highlights the unique features of the surroundings, creating an atmosphere that shifts with the light throughout the day. The design follows the accordion shape of traditional view cameras, which helps achieve a precise focus for visual projection.

Structural Organization
Within the design, four floating volumes interact thoughtfully with the landscape. These volumes are positioned to capture light during the day and transform into glowing elements at night. This relationship between light and structure encourages exploration and enhances the experience of the environment. As visitors ascend through a series of interconnected dark chambers, they move from shadow to light, creating a dynamic journey and reshaping their view of the landscape.

Materials and Sustainability
Materials mentioned in the construction include soil cement, which provides support for the entrance, reception area, and cafeteria. This choice links the structure to the ground. The main framework employs a steel system that gives the appearance of floating volumes above the landscape. Additional elements enhance sustainability, such as solar panels, geothermal heating, and rainwater collection. These features reduce the environmental impact while ensuring the structure functions responsibly within its natural context.

Illuminated chambers at night serve as beacons, guiding visitors while framing shifting views of the Icelandic terrain. The interplay of light and shadow enriches the overall experience, allowing moments of reflection and connection between people and the landscape.

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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.

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100,000€ Prize / 2025 ideas COMPETITION
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