
We're in Piraeus, our first stop in Greece.
We are here one night. Tomorrow, 7am, we'll be on the ferry Blue Star Delos, taking it as far as the island of Naxos. After we get off, the ferry goes to Santorini then returns to Piraeus before midnight.
Piraeus is Athen's port, a dense old city that occupies the space between Athens and the Mediterranean. It's not I think a destination in itself, it is more a place to stop while waiting to go elsewhere. This being Piraeus, elsewhere is via a boat, likely a ferry.