The twenty-two-arch bridge over the Arlanza Monument · Tordómar, Arlanza, Burgos Image of Tordómar, not of the place itself. Twenty-two arches cross the Arlanza here, and several of them are clearly Roman. The bridge linked Clunia with the roads towards Cantabria, Segovia and Astorga at one of the major crossings of the valley. Photo: Rowanwindwhistler (CC BY 3.0) What to see and do in Tordómar