Natural Monument of the Serrezuela de Valsalobre Nature · Valsalobre, Serranía Alta, Cuenca Image of Valsalobre, not of the place itself. An area of 734.5 hectares declared a natural monument on 13 May 2003 for its karst landforms. It brings together the largest number of shafts in the whole of Spain, as well as large limestone pavements, ruiniform relief and galleries with a great variety of speleothems. Photo: Wikipedia / Wikimedia Commons (CC BY-SA) What to see and do in Valsalobre