The Arlanza gorge at Puentedura Nature · Puentedura, Arlanza, Burgos Image of Puentedura, not of the place itself. The river arrives here set between limestone cliffs, with poplar and willow groves on the valley floor and a bridge that gave the place its name. The rock walls of the surroundings are territory of griffon vulture and Egyptian vulture. Photo: TurismoRuralArlanza (CC BY-SA 4.0) What to see and do in Puentedura