If your trip to Oliveira do Douro is all organized but your itinerary is a little on the empty side, let us give you a helping hand.Stop by Caldas de Aregos Thermal Baths. It's one sight you'll usually find on many travelers' must-do lists. Caldas de Aregos Marina and Junta de Freguesia de Cinfaes are also not far away and worth taking the time to see.