The dinosaur footprints of Costalomo Curiosity · Salas de los Infantes, Sierra de la Demanda, Burgos Image of Salas de los Infantes, not of the place itself. At the site of Costalomo dinosaur footprints were left impressed on the rock. They are the visible face of a subsoil that has given the comarca one of the richest fossil records of the peninsular Cretaceous. Photo: Zarateman (CC0) What to see and do in Salas de los Infantes