The Adriatic Sea is a body of water that separated Italy from the Balkans. Merchants use this route to travel to foreign countries. The seas can hide pirates, making merchant crew specious of there crew and any stowaway. It is Northernmost arm of the Mediterranean Sea. Marco and his friends where caught by Captain Alexander and his crew while traveling over the Adriatic sea. They where willing to throw them over board into the sea by the crew for being Stowaways, and yet again threaten by pirates. On the Adriatic Sea there are many islands. One notable location is Treasure Island a small uninhabited island in the Adriatic Sea.