From the early 1900s, the island was known as Raz Island, named after the family that lived there. In the late 1930s, it was purchased for $800 by a man named Delmar "Radio Nick" Nicholson, who renamed the island "Idle Bay Isle" and lived there for 20 years with his wife and pet crane. It was later sold, renamed "Riles Island," and used as a hunting retreat. Disney bought the island in 1965 as part of its secretive property acquisitions before building Walt Disney World Resort.[1]
The island opened as Treasure Island on April 8, 1974, as a place to observe wildlife, and was later renamed Discovery Island. It closed to the public on April 8, 1999, but continued to operate until July 9, 1999, at which point all of its animals had been relocated to new homes at Disney's Animal Kingdom (whose Safari Village hub area was renamed Discovery Island) and other zoos.