Piraeus is Europe's largest harbour measured in passengers travelling to and from the harbour.
And Piraeus is the World's third largest harbour in passenger travel.
Piraeus is the World's 47th largest harbour if you look at the cargo that goes through the harbour. Cargo is concentrated on the Western side of Piraeus.
There are ferries, hydrofoils or catamarans going to virtually all the Greek islands from Piraeus, with a sailing time of 7 hours to Crete till example.
Traffic in Piraeus never stops. This hydrofoil is arriving at Piraeus in the light of the rising sun with early commuters.