Castle Island is a peninsula in South Boston on the shore of Boston Harbor. In 1928, Castle Island was connected to the mainland by a narrow strip of land and is thus no longer an island. It has been the site of a fortification since 1634, and is currently a recreation site and the location of Fort Independence.
Location: Boston, Massachusetts, United States
Elevation: 33 ft (10 m)
Area: 22 acres (8.9 ha)
Administered by: Massachusetts Department of Conservation and Recreation
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