Merveille

Merveille is a place in the Grand Line called "Hidden Land in the Clouds". It is where the Golden Lion Shiki and his doctor Indigo created many mutated animals in the hopes of having an army to overthrow the world. Of these animals shown 22 years ago is a land-walking squid, giraffes as tall as skyscrapers, and a giant turtle-like creature. Not only does it contain Shiki's army, it also contains people who have feathers on their arms that enable flight. The island is also home to the rare IQ plant, in which Indigo used as a basis for his SIQ drugs for creating the mutant army.

The island was turned into a floating sky fortress with Shiki's levitating abilities, and an ancient Japanese-stylized palace in the center of it. After a grueling battle between Shiki and Monkey D. Luffy, when the latter smashed the former with a gigantic lightning storm-enhanced kick, Shiki's flying powers over the island was deactivated, and Merville came crashing down into the sea.

Translation and Dub Issues

 * Merveille is the French word for "wonder".