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From Martian Hydrospheres to Forest-Like Cities: 6 Radical Urban Visions Unveiled at the Venice 2025 Architecture Biennale

Cities today are being reimagined as living, evolving organisms, combining digital intelligence, ecological systems, and new materials to shape radical futures. At Carlo Ratti's "Intelligens. Natural. Artificial. Collective." biennial, over 750 participants challenge established boundaries between architecture, landscape, and technology. Several conceptual projects showcased in the main exhibition challenge conventional boundaries between architecture, landscape, and technology. From bio-adaptive urban systems and Martian water-based settlements to immersive symphonies of satellite data, these works collectively envision new models for cohabitation, resilience, and planetary awareness.

This month's Unbuilt selection presents six speculative projects, presented as part of the 2025 Venice Architecture Biennale exhibition, as provocations for rethinking the future of cities and human settlement. While some proposals transform architecture into self-sustaining, living infrastructures, others explore how data and sensory interfaces can redefine our relationship with natural and urban environments. Together, they offer a cross-section of how architects and designers are using unbuilt work to imagine new possibilities for life on Earth and beyond.

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Behind 8,000 Doors: Inside Three Standout Architectural Projects

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14 individual brands and two subsidiaries are represented under the Swiss brand Arbonia. Although the brand, which is now making its long-overdue public debut, maybe new, the list of realized projects certainly is not. A glance at the reference archive, which Arbonia presents prominently, shows this. These include construction projects for the healthcare sector as well as offices and administration, historical buildings, educational institutions, hospitality and residential developments. Three particular distinct highlights stand out, as they uniquely embody Arbonia's motto: 'open to aspiration'.

Architecture and Light Between Documentation and Emotion: In Conversation with the Photographer Thomas Mayer

For over five decades, Swiss photographer Thomas Mayer has developed a serene, emotional, and documentary language for architecture. His lens captures the random and memorable moments of our built environment - reflections in the rain, long blue hours in Nordic summers, and the quiet darkness of sacred spaces. Recognized by ArchDaily as one of the top architectural photographers, Mayer carries an abundant fascination for light and space.

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When Metal Breathes: The Porous Skin of the Steirereck Restaurant

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At the Steirereck am Pogusch restaurant, architecture and gastronomy seem to speak the same language: that of the sensitive transformation of raw materials. Local ingredients, like leaves, roots, and flowers, are turned into surprising dishes, where simplicity is elevated to the extraordinary. Likewise, the building, far from being a static structure, offers a unique tactile and visual experience. One of the most intriguing elements is the use of stabilized foamed aluminum panels that, rather than evoking the coldness and rigidity often associated with metal, have been manipulated to transcend their conventional characteristics. They seem to breathe, with their porous, textured surfaces absorbing and reflecting light, creating a play of shadow and brightness that evokes the lightness and organic quality of natural materials.

Design Without Disruption: A Better Way to Access What’s Behind the Wall

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In high-end architectural design, traditional access panel fasteners like visible screws and magnetic closures often disrupt aesthetics and functionality. These outdated methods can loosen over time, lack durability, or require visible frames, making them unsuitable for premium spaces. Whether you need to access electrical systems, HVAC components, or plumbing, choosing the right installation method is crucial for a seamless integration into your space.

Early hidden solutions like French cleats and Z-clips improved appearance but introduced new challenges. These systems require sequential panel removal and extra clearance, making maintenance difficult—especially in areas needing frequent access. The unavoidable gap that appears at the top of panels also compromises the aesthetic appeal, as well as cutting out sections of panel for wall sockets.

Forming a Distinct Identity: How Brutalism Shaped American Architecture Education

By the mid-nineteenth century, American universities began to distinguish architecture from civil engineering and the applied sciences formally. Architecture was emerging as a discipline defined by both technical competence and conceptual inquiry, spatial imagination, and cultural agency. As this disciplinary identity evolved in the postwar decades, its built expression coalesced into the emerging architectural language of Brutalism.

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The Benefits of Extruded Tile Technology in Modern Architecture

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In modern architecture, materials must meet a range of functional, aesthetic, technical, and environmental demands. Gres Aragón offers ceramic tile solutions that respond to all aspects of a project—from façades and interiors to exteriors, pools, staircases, and industrial spaces—while maintaining a consistent design language.

With more than 80 years of experience and deep expertise in the extruded tile manufacturing process, Gres Aragón has established itself as a trusted partner for architects and interior designers. Its product offerings are based on four core principles: visual continuity, extreme durability, high-tech performance, and a strong commitment to sustainability.

Built to Last—or Change? The Case for Dry Construction in Humid Cities

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In certain parts of the world, construction is still dominated by wet systems—concrete, masonry, and cementitious materials that are poured, cured, and fixed in place. While this has long been considered the norm in some south-east Asia countries, such as Singapore, Thailand, Malaysia, and China, in most of these regions, they typically share a common trend where labor is relatively inexpensive. This serves as one of the reasons to make concrete more easily available, as one of the typical downside of concrete is its intensive labour cost - this further differentiates concrete as a cheaper and more efficient material system to be building out of.

However, not enough considerations in the region are given to the sustainability aspect when using these wet construction materials,often overlooking the significant drawbacks of its material lifecycle and the difficulty to recycle it without downcycling - making it one of the more unsustainable materials available to be built out of.

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