Sea of Time Islet

The Sea of Time Islet is a small island located southwest of the Sea of Time and explorable in Golden Sun: The Lost Age. It is only inhabited by two old men and a tiny one-room hut. Also on the island is a turtle named Lonesome George, who desires a turtle friend of his own to break up the loneliness.

This is by no means an insignificant location from a gameplay perspective. If you give Lonesome George the Lil' Turtle "item" acquired from a dog at West Indra Islet, it will agree to ferry you to a nearby cave entrance in the water, which is the entrance to none other than the optional dungeon Islet Cave. If you have the Teleport Psynergy, you can battle the optional boss Sentinel and earn the Summon tablet Catastrophe.

Trivia

 * Some players have noticed that the old man on the beach doesn't turn to you when you start talking to him. This could be due to a glitch in the programming.