Alcatraz, often referred to as "The Rock," is a small island located in San Francisco Bay, California. It is best known for its historic federal prison, which operated from 1934 until 1963 and housed notorious inmates like Al Capone and Robert Stroud. The island is now a popular tourist destination, featuring a museum and guided tours that highlight its history, including both the prison and its earlier use as a military fortification. Alcatraz is also notable for its stunning views of the San Francisco skyline and the Golden Gate Bridge.