Little island...mason's island....i bet the entrance is under the bridge...........they have entrances for repair crews.....so an entrance already exists......South Moon Under........Virginia...the capital of the South........

Little Island

Washington, DC 20566

Theodore Roosevelt Island (U.S. National Park Service)

https://www.nps.gov/this/index.htm

In the 1930s, landscape architects transformed Mason's Island from neglected, overgrown farmland into Theodore Roosevelt Island, a memorial to America's ...

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