The Six Bridges Cruise
There is a boat ride on the river Douro that is very interesting yet very touristy. It takes about three hours and you can visit the river bridges. The best is to see all the facades facing the river, both the buildings of Porto and those of the city called Gaia, where are the wine cellars of the Ribeira Oporto. There are many restaurants but they trick people, they think that the only thing to season is oregano and the tourist life is of suffering.