Isle of Ruins
From Zelda Wiki.org
The Isle of Ruins is an island found in the northeastern quadrant of the sea in Phantom Hourglass. Very odd in shape, it contains numerous islands interconnecting with walkways, instead of just one piece of land. It is the location of the ancient Cobble Kingdom, and houses three pyramids containing the spirits of ancient knights, in addition to Mutoh's Temple. The water level can be lowered on this island, revealing more land.

