The Odlaw Swamp is a swamp occupied by hundreds of Odlaws. The location was featured as a scene in The Wonder Book. Waldo and the gang travel through the Odlaw Swamp, a place full of Odlaws and other black and yellow creatures - included snakes, monkeys, birds and other monsters.
In the scene, the "real Odlaw" is the one located closest to his binoculars.
The yellow and black striped creatures from the Odlaw Swamp appeared again in "Odlaw's Picture Pandemonium" in The Great Picture Hunt.
The final scene of Where's Waldo in Hollywood, entitled "Where's Waldo: the Musical", features a scene full of actors and actresses dressed as Waldo, Wenda, Wizard Whitebeard, Woof and Odlaw. While the Odlaw characters in this scene are just actors dressed as Odlaw and are not from the Odlaw Swamp, it does incorporate the same theme of having multiple Odlaws. The Great Picture Hunt featured a scene entitled "Waldo World, which featured multiple Odlaws, along with doppelgangers of Waldo, Wenda and Wizard Whitebeard.