view of the castildetierra cliff and desert grasslands in the bardenas reales desert in northern spain

arid bardenas barranco beauty biosphere cabezo canyon canyonlands castidetierra castildetierra cliffs cortinas desert dry erosion europe european grasses grasslands hill landscape las mamelon maountain mesa monumento mountain nature navarra reales reserve sand sandstone savannah scenery segador shrubs spain steppe table