Mount Etna Caves National Park contains some of Australia's most cavernous limestone formations. Protected from fire by the limestone karst, dry rainforest thrives amongst sharp pinnacles and shady crevices. The national park is especially important to a number of bat species. Eighty per cent of Australia's breeding population of female bent-wing bats use a single cave in the national park for birthing and rearing their young. During this time ranger guided tours are offered to see the spectacular nightly emergence of over 100,000 bats. Tours operate during the bat breeding season, from December to February (fees apply). Outside of this time the track is open to the public. Picnic at the Cammoo Caves picnic area and go on a self-guided walk.