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Black Lava Sand Structure with Plant Epidermis in a Thermal Waters Retreat

Authors:
Alexandra Paltineanu, Nicolas Tzimakas
Black Lava Sand Structure with Plant Epidermis in a Thermal Waters Retreat
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Constructed with black lava sand and enveloped by a living plant epidermis, the retreat harmonizes with its thermal waters while offering spaces for communal engagement and personal reflection.
5 key facts about this project
01
The structure incorporates black lava sand concrete to blend with the volcanic landscape.
02
A living plant epidermis is used to enhance environmental integration and seasonal change.
03
Thermal waters are visually accessible from the central gathering area.
04
Footbridges connect various pavilions, promoting circulation and interaction.
05
Design elements reflect the cultural narrative of the hidden people of the land.

The design presents a thoughtful blend of built structures and the natural landscape, located in a remote area that highlights a connection to elemental themes. The concept centers around the notion of a “ship” anchoring itself to the ground, promoting a relationship between the architecture and the environment. This space serves as a refuge for travelers, encouraging both social interaction and opportunities for personal contemplation.

Conceptual Framework

The idea of the “hidden people” is an essential theme, drawing from cultural narratives that highlight the significance of indigenous inhabitants. This approach reflects an understanding of ecological balance and a desire to harmonize with the surrounding ecosystem. The arrangement of spaces balances private areas and communal ones, allowing users to engage deeply with the architecture and the natural environment.

Spatial Configuration

Users enter through a space referred to as the “Earth’s concavity,” which leads to a welcoming central foyer. Here, elements like dancing flames create a warm atmosphere. This area encourages social gatherings while maintaining views of the nearby thermal waters. Throughout the site, footbridges and pavilions serve specific purposes, including wellness activities and social gatherings, helping users navigate the various areas of the design efficiently.

Material Considerations

The materials chosen for construction are vital to achieving the overall vision. Black lava sand concrete makes up the base, connecting the structure to its rugged surroundings. The use of manufactured panels forms the main structural framework, providing both stability and versatility. Concrete panels act as protective layers, complemented by a textured white finishing plaster that harmonizes with the landscape. Additionally, the inclusion of a plant epidermis hints at an ongoing interaction between the architecture and nature, creating an evolving surface that changes with the seasons.

Spaces invite users to find peace among the elements, with design details that enhance the overall experience. Light and shadow play together, creating a dynamic environment that encourages reflection and deeper connections with the world outside.

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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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Competition organisers

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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