15. Discovery Island
River Country isn’t the only abandoned area of Walt Disney World. Discovery Island first opened in 1974 as Treasure Island, a pirate-themed area. However, two years later it was renamed and transformed into a bird sanctuary for guests to visit. The idea was for the area to act as a resting place for families to see flamingos, ostriches, and other exotic birds in between visits to the main parks.
Discovery Island’s popularity fell with the 1999 opening of Disney’s Animal Kingdom in Disney World. Eventually, the island’s birds were moved to the new park, and its buildings and structures were left in ruins.