Photos of flora commonly found on Alcatraz Island, presented by volunteers of the Garden Conservancy. To find out more on how you can volunteer visit Support Your Park.
See these charismatic seabirds nest on the island
A look at some of the items from the island's prison era now preserved in the park's archives.
Photos from the Indians of All Tribes occupation of Alcatraz. These were taken by Swedish photographer Bengt af Geijerstam in July of 1970, and are copyrighted by the photographer.
Golden Gate National Recreation Area
B201 Fort Mason
San Francisco, CA