Nature's balancing act

These aren't your ordinary rocks! One of the oldest-known religious locations, the Devils Marbles Conservation Reserve is a sacred site to Aboriginal Australians. The site, also called Karlu Karlu, in Australia’s Northern Territory, is home to a collection of giant, gravity-defying boulders. These rocks are composed of granite, and their peculiar shape is the result of millions of years of weathering and erosion.
© Yva Momatiuk and John Eastcott/Minden Pictures