The Jenolan Caves (http://www.jenolancaves.o...) are in the Blue Mountains region of New South Wales, Australia. They are regarded as Australia's most outstanding caves and are amongst the best in the world. Also the cave system has been dated to 340 million years, making them the oldest known caves on Earth.
Jenolan's main attractions are the ten spectacular caves that are open to the public, filled with astonishing limestone formations. The caves are open all year. They are very popular, receiving 250,000 visitors per year. In 2008 and 2009, Jenolan Caves won awards for their array of tours, activities and facilities. Visitors can spend a couple of hours and see only 1 cave or stay for a week and have a thorough escape at Jenolan Caves. During school holidays and on long weekends you may find Jenolan Caves crowded and may have to park in the upper car park, but there will be many more cave tours as well, to cater for all the visitors.