the caves of sant miquel del fai

abstract adventure amazing ancient art background bright calcarean catalan catalonia cave caveman cavern caves caving color colors dangerous dark darkness deep del earth entrance europe european exploration fai fantastic feature formation gelogic geologic geological geology history hole inside interest interesting interior landscape light limestone majestic mine miquel mountain mysterious mystery narrow natural nature old opening passage prehistoric primitive river rock sant scenic spain spanish speleology stalactite stalagmite stone terrain tourism travel tunnel underground wall water wild