Nanimonai Island

Nanimonai Island (the Island of Nothingness in the English manga translation) is an uninhabited island just beyond Alabasta. Nanimonai Island is only mentioned but never seen.

Miss All-Sunday gave Luffy an Eternal Pose to this island to help the Straw Hat Pirates reach Alabasta, but Luffy destroyed the pose, refusing to let her, an enemy, choose their route.

As confirmed during the Little Garden Arc, this island is actually feces (droppings) left by a giant goldfish, this is one of Usopp's first lies to become true.

Trivia

 * "Nanimonai" means "nothing" in Japanese.
 * "Feces" is another word for droppings/dung.