If there is a city one must visit, Lisbon is one of them. We ran into Peter Coville during our short stay in Lisbon. He is a former philosophy teacher from England, living in Lisbon, and runs walking tours of Lisbon every morning. He gave us a small taste of the city and its history. If you ever get to Lisbon and need a guide who knows a lot about the city of Lisbon, Peter Coville is your man.