Alcatraz Island

Alcatraz Island is a famous prison island off the shore of San Francisco. Briares, a hundred-handed elder brother of the cyclops and Tyson's famous hero, was held in the prison by Kampê. Percy, Annabeth, Tyson, and Grover broke him out and helped him escape into the Labyrinth in The Battle of the Labyrinth.

Alcatraz and the Mortal world
In the human (mortal) world, Alcatraz is a famous national prison island used by the United States government to hold as many hell-determinded bad guys as it could such as well known gun-killing gangsters that were held there for governmental reasons. in the 1930s to the 1940s, Alcatraz held prisoners ranging from bank robbers to street gangster bosses such as Al Catrone, the famous wellknown gangster boss from Chicago, Illionis. It was also America's own "Devil's Island". There was also a television episode called "Alcatraz" in which described that ten of its most famous prisoners tried to escape from the prison and the island itself bravely but the island caught them.

The Battle of the Labyrinth
In The Battle of the Labyrinth, Annabeth tells Percy and the others after they rescue Briares that she once took a school trip here. Fortunately, she knew which way was out of the prison buildings leading to the outside while they were persuaded by Kampe, a Titan monster freed from Tartarus in the Underworld by Luke Castellan and his Titan Army. Later, Tyson, Percy, Grover, Annabeth, and Briares fight Kampe before they finally make an fortunate escape back into the Labyrinth.