What is the name of the Island located in San Francisco Bay, 1.25 miles offshore, with facilities for a lighthouse, a military prison, and the Parade Grounds, a large concrete open area?
Parade Grounds The Parade Grounds is a large concrete open area on the south end of Alcatraz Island, off the coast of San Francisco, USA. They lie beyond Building 64. They were originally built in the 1860s on a barren site by the U.S. military who used the site for military drills and parades.
McNeil Island McNeil Island is an island in western Puget Sound, located just west of Steilacoom, Washington, with a land area of 17.177 km² (6.6319 sq mi). It lies just north of Anderson Island. Fox Island is to the north, across Carr Inlet. To the west McNeil Island is separated from Key Peninsula by Pitt Passage. The Washington mainland lies to the east, across the south basin of Puget Sound. The island has been owned by the government for most of its history and has been home to the United States Federal Penitentiary from 1875 until turned over to Washington State Department of Corrections in 1981 and was renamed as the "McNeil Island Corrections Center" until 2011, when it was closed. Prior to its closing on April 1, 2011, it was the last remaining island prison in the country to be accessible only by air and sea.