chiquita cave in canamero, caceres, spain

snakeshaped reddish stain cueva chiquita canamero extremadura caceres travel villuercasiboresjara geopark detail alvarez natural oxidation ferrous minerals popular tradition snake fable goatherd monster dragon neolithic stone wall site rockshelters prehistoric times primitive iron oxide nature rocky outcrop gorge ruecas river quartzite strata destination europe geotourism mountainous rocks impressive mountain ranges attraction idyllic spot space