Long Island, Harbor island in Boston, United States.
Long Island is an island in Boston Harbor that stretches about 1.75 miles (2.8 km) across the water. The land rises in three natural mounds that you can see from different parts of the harbor.
The island served military purposes during the American Revolution and later as a training site in the Civil War. From the 1800s onward, it became the home for social services and medical facilities supporting the city.
From the 1800s to 2014, Long Island operated as a center for social services, housing medical facilities and support programs for Boston residents.
Access to the island has been restricted since 2014 when safety concerns led to the bridge closure from Moon Island. Visitors can only view it from the water or from the nearby shore.
The Long Island Head Light was built in 1819 and is one of only three Boston Harbor lighthouses listed in the National Register of Historic Places. This structure remains a recognizable marker for people navigating the harbor.
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