Piraeus is the biggest port in Greece and one of the biggest in the Mediterranean. Piraeus Central port is also the largest passenger port in Europe and one of the largest in the world that services annually approximately 20 million passengers, connecting the mainland with the Aegean islands.

It is also a major destination for cruise ships in the Mediterranean, a sector that is constantly upgrading since cruises are often beneficial for the national economy by creating jobs and strengthening the tourist exchange.