Official Site: https://www.nps.gov/alca/index.htm
Wikipedia: https://en.wikipedia.org/wiki/Alcatraz_Island
Facebook: https://www.facebook.com/alcatraznps
Twitter: https://twitter.com/alcatrazisland
In 1972, Alcatraz became part of a national recreation area and received designation as a National Historic Landmark in 1986.
Today, the island's facilities are managed by the National Park Service as part of the Golden Gate National Recreation Area; it is open to tours. Visitors can reach the island in a little under 15 minutes by ferry ride from Pier 33, located between the San Francisco Ferry Building and Fisherman's Wharf, San Francisco. Hornblower Cruises and Events, operating under the name Alcatraz Cruises, is the official ferry provider to and from the island.
https://sites.google.com/view/nationalmonumentsindanger/nps/golden-gate-national-recreation-area