Turn the cabezo
The park describes cabezos as harder layers protecting softer clays, and Castildetierra as the most extreme case: a mesa tilted with the dip of the materials. Visit Navarra calls it an inverted funnel.
The model is by BiotanTec: photographs from a DJI Phantom 4, reconstructed with Pix4D, published on Sketchfab on 28/10/2017 (Castil de Tierra - Bardenas Reales). Vive Bardenas is not the author and does not host the file: this is the author’s viewer. It does not mark access and does not allow a climb: climbing is forbidden. The cabezo sheet is Castildetierra.
Official sources
Park instructions and on-site signage take priority over this guide.