Earth castle

The arid lands of Navarra. One of the most incredible places and one of my favorites in Spain. The Bardenas Reales is a semi-desert natural region, or badlands, of some 42,000 hectares in southeast Navarre. The soils are made up of clay, chalk and sandstone and have been eroded by water and wind creating surprising shapes, canyons, plateaus, tabular structures and isolated hills, called cabezos