1. Islet of Steel, inside the tower.
2. Private Cabana, in the basement. You need the Cabana Deed in order to enter.
3. Bird Peak's Rock, by activating some crystal switches using a seagull so you can enter a secret cave.
4. The Great Sea, on board the Ghost Ship. You need the Ghost Ship Chart to make it appear at the various locations it will show up at at the right lunar phase.
5. Needle Rock Isle, where the golden cannon ship sinks.
6. Outset Island, on the 31st floor of the Savage Labyrinth.
7. Stone Watcher Island, after completing a battle dungeon.
8. Overlook Island, after completing a battle dungeon.