Piraeus is the water gateway to Athens. From the cruise pier, we walked about 30 minutes to the metro station. From there we took the train into Athens. Once in Athens we went to the Parliament Building, the site of the Tomb of the Unknown Soldier, to see the changing of the guard. After the ceremony we strolled down Ermou Street. We went past the Cathedral, several other churches and then wandered the Plaka winding up in Monastiraki Square for lunch. After lunch we wandered the Ancient Agora before heading back to the ship.