Mammoth Cave (English Mammoth Cave ) was first discovered by European settlers in 1850, but was not explored until 1895. Since 1904, when electric lighting was carried out, the cave was open to the public. Located in the southwest of Western Australia , 21 km from the city of Margaret River and 300 km south of the city of Perth . Mammoth Cave is located on the territory of the National Park en: Leeuwin-Naturaliste National Park , which generally contains several hundred caves. The Mammoth Cave is 500 m long and 30 m deep. It is surrounded by eucalyptus ( Eucalyptus diversicolor ) corymbian ( Corymbia calophylla ) forest. The Pleistocene (1.8–0.0 Ma BC) macrostations of representatives of the genera Thylacinus , Zygomaturus , Sthenurus , Macropus, and the species Zaglossus hacketti were found in the cave. Way of preservation: primary phosphate .