If only the time-weary walls of Monsanto Castle could talk! But seeing they can't, inquire if tours are available to hear a couple of its intriguing tales instead.
This fortified complex is free to enter, which is excellent news if you're watching your pennies. Monsanto Castle is located in Monsanto. Once you've seen this place, Idanha-a-Velha, Egitaniense Epigraphic Museum and Penha Garcia Castle are in the area and also worth exploring.