As evident as it may be, the Mosteiro da Serra do Pilar is a little frequented place. The fortified cloister dominates Vila Nova de Gaia from above, but does not receive frequent visitors. Although it continues to be used by the army, guided tours are available every day. It is highly recommended to visit this monument because of its 16th century architectural style and the unusual circular shape of the cloister and the church. From the dome you can admire an endless view of both banks of the Douro. Why not take the cable car and sip a good glass of port on a terrace in Cais de Gaia?