|For the myth in GTA IV, see Peach Island.|
The Secret Island is allegedly a very large island far away from the state of San Andreas. The island is supposed to have every known myth from GTA San Andreas upon it, with a different area for each myth, such as, a giant forest for Bigfoot, water for Nessie, and a town, which contains all of the haunted buildings, examples are, The Creepy House, Catalina's Cabin, Shady Cabin, Mount Chiliad Cabin, and the Hell House.
The island also has a giant volcano in the middle, and is surrounded by shark-infested waters. This myth is clearly false, because no matter how far away the player goes from the mainland, they will never be able to reach it, since the ocean is endless.