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Volcanic Stone and Black Concrete Unite in a Cavernous Multi-Functional Space

Authors:
Romain Petrot, Carla Beaujard
Volcanic Stone and Black Concrete Unite in a Cavernous Multi-Functional Space
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Constructed from volcanic stone and black concrete, the Icelande Cave Tower offers a multi-functional space that harmonizes with its Icelandic landscape while inviting exploration and interaction within its sculptural forms.
5 key facts about this project
01
Built from volcanic stone, the structure reflects the regional geology.
02
Black concrete enhances thermal insulation and durability.
03
Sculptural stairs serve as both functional access and a visual centerpiece.
04
The design promotes visitor interaction through fluid spatial organization.
05
Multi-functional areas accommodate diverse activities and gatherings.

"Black Earth Rising" is a design centered on the Icelande Cave Tower, located in the dramatic landscape of Iceland. The structure functions as a multifunctional space, focusing on providing a connection with nature. The design concept features sculptural forms that enhance movement and interaction among visitors, creating an engaging experience.

Sculptural Stairs

A key element of the design is the inclusion of sculptural stairs. These stairs are not only practical for accessing different levels but also act as a central visual feature. They invite visitors to explore the tower, guiding them through the space and creating a dynamic atmosphere. The result is a flow that encourages movement within the structure.

Spatial Organization

The layout of the tower is carefully considered to promote interaction among visitors. Each space is planned to allow for both communal activities and private moments. The organization of the areas helps maintain a balance between openness and intimacy. Such a layout complements the surrounding landscape, enhancing the experience of being in a natural environment.

Material Selection

Materials play an important role in the project. The chosen materials include black concrete, black cement, limestone flour, black sand, volcanic black stone, and concrete composition. These materials reflect the dark tones and textures found in the Icelandic landscape. Their use emphasizes the relationship between the structure and its natural surroundings, contributing to a cohesive design.

The design features details that respond to the environment, especially how light interacts with the shapes throughout the day. This play of light and shadow on the forms adds depth to the visual experience, allowing the tower to resonate with the dramatic landscape in which it stands.

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MICROHOME 2026
MICROHOME 2026
100,000 € Prize Fund / Kingpsan Edition #11
The Next House: USA
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20,000 USD Prize
Buildner's Unbuilt Award 2026
Buildner's Unbuilt Award 2026
100,000€ Prize / 2026

The Next House: USA — A Global Call to Reimagine the American Suburb

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Competition organisers

Buildner is launching The Next House: USA, a global architecture competition that challenges architects, designers, and thinkers to reimagine the American suburban home for the 21st century. For decades, the suburban house has symbolized comfort and stability, but today it often reflects excess, isolation, and environmental strain. This competition asks: how can the American home evolve to address climate urgency, economic pressures, and shifting social values?

Participants are tasked with designing a prototype home of no more than 1,500 sq ft (≈140 m²) for a household of two adults and one child. The design should be compact yet generous, adaptable, sustainable, affordable, and replicable across diverse U.S. contexts. More than a design exercise, the competition aims to spark a conversation about how homes can support healthier, smarter, and more connected communities.

The total prize fund is $20,000 USD. The final registration deadline is May 20, 2026, and winners will be announced on September 22, 2026. The Next House: USA invites architects, students, and visionaries worldwide to redefine what the American home means today—and what it should mean tomorrow.

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