Shanghai-based Xiang Architects has completed the Chenhu Migratory Bird Observation Tower in Wuhan's Chenhu Wetland, a 19.9-meter steel structure perched on a 22-meter natural elevation at Xianglushan.
The tower replaces a conventional central core with two counter-rotating staircases that interlock like a double helix, each flight rising about 1.5 meters before reaching one of 24 viewing platforms.
Visitors ascending and descending follow separate paths, creating a continuous loop that the architects describe as three perceptual stages: ascending, turning, and overlooking.
The structure was assembled from 24 prefabricated steel sections; the counter-rotating braces provide structural stability without a central column.
Steel cladding was chosen to make the tower a visible landmark rather than a camouflaged blind, reflecting sky, mist, and sunset light across the wetland.
From the top platform, observers can see the full expanse of the wetland, Tonghu town, and the Tongshun River, where more than 100,000 migratory birds gather from October to March.
Xiang Architects said the design intends to slow the act of observation, making the journey through changing perspectives as significant as the final panorama.
The project was documented by design publications Gooood and Dezeen.
Dramatic double-helix steel tower turns bird-watching into walkable art
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