Walk from the ship to the port gates (5 mins) pick up the red hop on hop off bust which takes you round all the important bits of Athens for just 22 Euros, The buses have Air Con , an open top deck and are great value for money. The Red bus lin has more buses than the yellow one
Naples was the worst port of the lot, it is a complete Dump. The inhabitants of this port were the most dishonest swindlers of all the ports visited . You expect to be ripped off by shopkeepers with an eye on the cruise ship you have just arrived in , but the Napolitans take the art to a higher level.