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Cave-Inspired Structure with Solid Walls Enhancing Pedestrian Connectivity

Authors:
Guanghui Lu, Bowen Zuo, Jizhao Peng
Cave-Inspired Structure with Solid Walls Enhancing Pedestrian Connectivity
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The underground section mimicking natural caves, combined with solid walls, creates an engaging bridge that enhances pedestrian connectivity while enriching the cultural experience in Sigulda, Latvia.
5 key facts about this project
01
The bridge incorporates an underground section resembling natural cave formations.
02
Solid walls blend with the landscape to reflect the region's historical context.
03
A nighttime botanical garden enhances user engagement with the environment.
04
Observation platforms provide varied perspectives of the surrounding natural beauty.
05
The design prioritizes barrier-free accessibility for all visitors.

In Sigulda, Latvia, a new bridge design merges with the natural beauty of Gauja National Park. The structure serves two main functions: it acts as a pathway for pedestrians and also provides an engaging educational space. By integrating elements of a mini museum, the design connects visitors with the area's cultural and historical context, establishing a dialogue between the environment and the past.

Design Concept

The bridge incorporates an underground section that resembles natural caves, creating a unique spatial experience. Visitors can explore this area, promoting interaction with the surroundings. Above ground, the bridge connects significant sites such as Spieķu Parks and the Sigulda Evangelic Lutheran Church. This careful positioning encourages people to traverse the area, enhancing their understanding of the landscape and its features.

Spatial Dynamics

The design leverages differences in elevation to create varied experiences for users. Elevated platforms and viewing points invite visitors to appreciate the scenic vistas while ensuring accessibility. The inclusion of a nighttime botanical garden and a Green Tower serves both practical and aesthetic purposes. These elements enrich the environment and help raise awareness of local ecology, creating a multifunctional space for all.

Materiality and Integration

Solid walls and landscape features are key components of this project. They blend with the site, reflecting the historical significance of the region. By emphasizing natural textures, the bridge creates a connection between the structure and its surroundings. It invites users to engage with both the architecture and the landscape, fostering a deeper appreciation for the area.

Elevating the Design Experience

Attention to detail is evident throughout the structure. Textured surfaces evoke a connection to the natural environment, enhancing the overall sensory experience. Light interacts with the materials, creating a shifting visual landscape that alters with the time of day. Each visit presents a new perspective, allowing users to engage with nature in diverse ways that enrich their experience of the site.

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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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