This ancient city port has three harbours, making it the largest port in Greece and one of the largest in Europe. Piraeus has religious and historic landmarks of its own, but Athens is only eight miles (13km) to the northeast and is easily accessible via a 30-minute metro ride or a 20- to 30-minute taxi ride. The port connects the peninsula with most Greek islands, and it’s the main stop for cruise ships touring the Aegean Sea. The port is reached by cruise lines such as Royal Caribbean, NCL, Celebrity, Princess, Azamara, Silversea and Virgin Voyages.

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The world's most beautiful ports visited by cruise ships