women inside a cave with sun shining above

sun rays sinkhole group three women explorer speleologist naturalist anthropologist cave limestone mountain underground inside ancient speleology geologic dark mineral tunnel cavern geology nature hole old stone wall rough darkness corridor view mysterious rock formation prehistoric exploration speleotheme boulders shapes earth fossil jurassic flowstone speleogens moonmilk mondmilch shining posing opening adventure terrain waterfall sports cliff recreation jungle ravine person water walking stream tree