U Thant Island, Artificial island in East River, Manhattan, United States.
U Thant Island is an artificial island in the East River situated between Roosevelt Island and Manhattan, measuring roughly 100 by 200 feet (30 by 60 meters). A navigation beacon approximately 57 feet (17 meters) tall stands on the island to guide river traffic.
The island emerged in the 1890s as a byproduct of Steinway Tunnel construction when landfill was deposited in the river. It was originally called Belmont Island after the financier August Belmont Jr. until its renaming decades later.
The island was named after U Thant in 1977 by a meditation group honoring the former United Nations Secretary-General whose diplomatic work shaped international relations. This naming reflects how the place became a symbol of peace and reflection for those who visit or pass by.
The island is closed to public access as a protected bird sanctuary to preserve nesting areas. You can observe it from nearby water routes or from Roosevelt Island across the river.
The island serves as a critical nesting and stopover site for double-crested cormorants and migratory birds passing through the region. The surrounding waters attract local anglers who fish for striped bass in the productive shallows.
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