Included Excursion: Porto City Tour and dinner at Alpendurada Monastery The “City of Bridges,”Porto, is Portugal’s second largest city. Its charm stems from its dramatic position above the river,with gabled houses closely terraced on the hill.You’ll be guided through the medieval city centre,which is a UNESCOWorld Heritage Site, then on to see the Romanesque cathedral. During the afternoon, the ship sails to Bitetos,where we will spend an evening dining at the former 14th-century Benedictine Monastery of Alpendurada, perched high above the river in a stunning setting.