Geoconservation sites/Famous geoconservation sites 1.1 Tham Le-stegodon The more than 3 km long limestone stream cave with outstanding geological features and fossils. The cave comprises beautiful speleothems, stalactites, flowstones and draperies. Many fossils found in the cave are a mandible with molars of 1.8 ma-10000 years Stegodon, a jaw of Elephas and ancient rhino, and dear horn, etc.