Lost Isles

The Lost Isles are a pair of small islands located in the ocean in the Caracara region.

Becca, a character from the Camry and Dulyn regions, has a vacation house here, the only house in the area.

The Lost Cavern is also located here.

Arriving at the Lost Isles
In order to arrive on the Lost Isles, the player must begin the "The Lost Isles...?" Quest from the Explorer Guy in Minneola Town.

Once this is done, in Mondelo City, inspect the book on the table in the house directly south of the Pokémon Center.

Then, fly back to the Explorer Guy in Minneola Town, and the player will be taken to the Lost Isles, which can later be flown to.

Trivia

 * The Lost Isles are based partly off the legends and location of the Bermuda Triangle.