Mediterranean Sea

The Mediterranean Sea is a sea connected to the Atlantic Ocean surrounded by the Mediterranean region and almost completely enclosed by land.

The name Mediterranean is derived from the Latin mediterraneus, meaning "inland" or "in the middle of the land" (from medius, "middle" and terra, "land").

The Mark of Athena
The seven demigods journey through there on their quest to save demigod Nico di Angelo and on their search for The Mark of Athena, the Athena Parthenos. They had to get permission from Hercules to pass, first.

Trivia

 * Romans call it the Mare Nostrum (meaning Latin for "Our Sea")