Beja castle, which King Dinis built in the early 14th century on the ruins of a Roman fortress, crowns the town. Although some of its turreted walls have been restored, the defensive towers -- save for a long marble keep -- are gone. Traditionally the final stronghold in the castle's fortifications, the old keep appears to be battling the weather and gold fungi. The walls are overgrown with ivy, the final encroachment on its former glory. From the keep you can enjoy a view of the provincial capital and the outlying fields.