Cathedral of Breath: Sustainable Underwater Architecture
Transforming the future with kelp gardens and underwater eco-design for biodiversity, carbon absorption, and marine renewal.
The Cathedral of Breath seamlessly blends sustainable underwater architecture with ecological renewal, creating an iconic pavilion and kelp farm off the coast of Cancun. This innovative project celebrates the cycle of decomposition and rebirth while inviting visitors to reflect on humanity's role within the ecosystem and the universe.


Architectural Masterpiece: Above and Below
The Cathedral of Breath comprises three integrated components: an above-water pavilion, an underwater diving experience, and a kelp collection web. Each element emphasizes humanity's coexistence with nature, fostering sustainability and habitat regeneration.

The Pavilion
Designed with a skeletal lattice structure inspired by whale carcasses, the above-water pavilion embodies themes of architectural decomposition and regrowth. Over time, vines and moss transform the lattice into a vibrant, living framework, mirroring the natural renewal observed in ocean ecosystems.
Key features of the pavilion include:
- Boat Dock: Welcoming visitors to the site.
- Observation Decks: Glass-walled spaces allowing views of the kelp gardens below.
- Diving Lobby: A gathering space for divers and events, doubling as a venue for weddings and celebrations.
The pavilion serves as a gateway to the underwater experience, with its elliptical entrance leading divers into the depths of the kelp gardens.
The Underwater Kelp Gardens
At the heart of the Cathedral of Breath lies the kelp garden—a self-sufficient system fostering marine biodiversity. Acting as a food source and habitat for sea life, the kelp garden exemplifies sustainable design by producing carbon-absorbing vegetation. Harvested kelp supports local industries while funding site maintenance.


Oxygenation Tunnel and Viewing Zones
Beneath the kelp garden, the Oxygenation Tunnel connects three observation zones located at varying ocean depths. Features include:
- Fish Oxygenation Attractors: Preprogrammed to draw marine life to viewing areas, creating lively interactions for visitors.
- Snuba Tracks and Air Pipes: Supporting divers with oxygen as they explore the tunnels.
- Glass Viewing Junctures: Offering breathtaking glimpses of oceanic life.
The Kelp Collector Webs
Surrounding the site, the Kelp Collector Webs ensure efficient harvesting of kelp while preserving marine habitats. Acting as natural sandbars, these porous structures catch kelp and guide farmers through a labyrinthine network to sustainably gather resources.

Environmental Takeover: A Living Ecosystem
The Cathedral of Breath is designed to evolve into a lush underwater habitat over time. Its decomposition fosters marine renewal, transforming the structure into a thriving ecosystem that sustains life both above and below the ocean’s surface.
Project Vision: Decomposition to Rebirth
Conceived by Haley DeGidio, the winner of the Underwater Web competition, the Cathedral of Breath redefines sustainable architecture. Through its focus on kelp harvesting and marine biodiversity, it highlights humanity’s ability to create structures that coexist harmoniously with nature.
The Cathedral of Breath invites visitors to experience the beauty of sustainable design while reflecting on their role in the environment. It stands as a testament to the potential of eco-architecture to inspire change, offering a glimpse into a future where humanity and nature thrive together

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