Cave houses and wine cellars of Dueñas Curiosity · Dueñas, El Cerrato, Palencia Image of Dueñas, not of the place itself. The hill on which the town rests is riddled with troglodyte dwellings and with an extensive network of bodegas cut into the rock, an underground architecture that defines the urban profile of Dueñas. Photo: jacilluch (CC BY-SA 2.0) What to see and do in Dueñas