Ithaca

Ithaca (Greek: Ιθάκη, Ithakē) is an island located in the Ionian Sea, in Greece, with an area of 120 square kilometres (46 sq mi) and a little more than three thousand inhabitants. It lies off the northeast coast of Kefalonia and to the west and within sight of continental Greece. Modern Ithaca is generally identified with Homer's Ithaca, the home of Odysseus, whose delayed return to the island is one of the elements of The Odyssey's plot.

The Blood of Olympus
Jason, Piper, and Annabeth are on their way to Odysseus' palace which is located in Ithaca.