Riversleigh, Paleontological site in northwestern Queensland, Australia.

Riversleigh is a paleontological site in northwestern Queensland containing vast limestone formations with fossils of prehistoric species. The deposits reveal a rich record of ancient life that flourished in the region millions of years ago.

Fossils were first noted at Riversleigh in 1901, and an initial exploration survey followed in 1963. Systematic exploration has been carried out since 1976, and in 1992 the area was added to Boodjamulla National Park. In 1994 it was listed as a UNESCO World Heritage Site together with the Naracoorte Caves in South Australia.

Riversleigh lies within Boodjamulla National Park, whose name comes from the Waanyi language. The Waanyi Aboriginal people are the traditional owners of this land, and the park is managed jointly with them. The fossil area was added to the park in 1992.

The primary visitor center is the Fossil Discovery Centre in Mount Isa, located about 150 km away. The site itself is in a remote part of northwestern Queensland and requires planning before visiting.

The often-quoted figure of 35 bat species is outdated; only about 25 have actually been described. The cave deposits are still exceptionally rich in bat remains, and the guano of the bats helped preserve the bones of other animals trapped in the same limestone cavities.