San Francisco Bay is the artificial and flat Treasure Island, site of the 1939 Golden Gate International Exposition. From the Second World War until the 1990s, both islands served as military bases and are now being redeveloped. Isolated in the center of the Bay is Alcatraz, the site of the famous federal penitentiary. The federal prison on Alcatraz Island no longer functions, but the complex is a popular tourist site. Despite its name, Mare Island in the northern part of the bay is a peninsula rather than an island. San Francisco Bay is thought to represent a down-warping of the Earth's crust between
Occupation of Alcatraz at 47 cents per acre, this amounted to $9.40 for the entire rocky island, or $5.64 for the twelve usable acres. Cottier also stated that the federal government would be allowed to maintain use of the Coast Guard lighthouse located on the island. The protesters left under threat that they would be charged with felony. This incident resulted in increased media attention for indigenous peoples' protests across the Bay Area. The United Council of the Bay Area Indian community initially considered writing a proposal and filing an application for the use of Alcatraz by Sioux people under the conditions of