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.
Shag Rocks (Massachusetts) Shag Rocks are barren rocks situated 8 nautical miles offshore of Custom House Tower in downtown Boston, in the Boston Harbor Islands National Recreation Area and within the city limits of Boston. The rocks are northeast of Little Brewster Island and east of Great Brewster Island and have been the site of several shipwrecks. Boston Light on Little Brewster Island warns mariners to steer clear of the rocks. Public access is impractical.