The rolling green hills of the Serra do Marão mountains serve as backdrop to the serene, small town of Pesu da Regua, known for its vineyards and wine. Visit the Casa do Douro to see stained glass windows that illustrate the significance of Regua’s port wine. At Casa do Douro,  you’ll find the 18th century map of the Douro Valley, drafted by Baron Joseph Forrester. Nearby, take a trip to the quaint village of Mesão Frio to experience the 16th century ceiling of São Nicolau cathedral, and the town hall for its 18th century design, once a cloister of the old Franciscan monastery. In Canelas, take a look at archaeological remains of an ancient Roman town.