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.
The Bay Lights The Bay Lights is a site-specific monumental light sculpture and generative art installation on the western span of the San Francisco–Oakland Bay Bridge, designed to commemorate the 75th anniversary of its opening. The installation by light artist Leo Villareal includes 25,000 individual white LEDs along 1.8 mi of the cables on the north side of the suspension span of the bridge between Yerba Buena Island and San Francisco. The installation is controlled via a computer and displays changing patterns that are not meant to repeat. The opening ceremony was held on March 5, 2013.