Porto, in addition to the Ribeira, is remarkable for its number of churches. San Francisco Memorial Church seen from the outside seems like the others, but hidden inside is one of the finest baroque treasures of Portugal - every inch is decorated. Such is the amount of detail, that if we are going to focus on all of it the visit would take a while. To enter the church you pay 3 € but this also gives you access to the museum and the catacombs. A highly recommended visit.