Visit the most iconic and recognized places in the city of porto on this 3 hour guided small group walking tour see the old monasteries and churches the prison and the jewish ghetto see civil buildings such as the most recognized bookstores of the world the clerics tower and all the other projects of the baroque architect nicolau nasoni the cathedral the remains of the city wall and the customs and mint house where prince henry the navigator was born all this on a nice stroll with an ex