Riversleigh in north west Queensland, Australia, is one of the Australian Fossil Mammal Sites listed by UNESCO as a World Heritage Site. The other is the Naracoorte Caves National Park in South Australia. The Riversleigh site is part of the Boodjamulla National Park. The fossil site covers an area of about 100 km².
The fossils that have been found are the remains of ancient mammals, birds and reptiles of Oligocene and Miocene epochs. The site was listed as a World Heritage site in 1994. The fossils at Riversleigh are rare because they are found in soft freshwater limestone which has not been compressed. This means the animal remains retain their three dimensional shape.