Planehenge, also known as the Mutonia Sculpture Park, is one of the most unusual landmarks along the remote Oodnadatta Track in outback South Australia. It was created by mechanic-turned-artist Robin “Mutoid” Cooke, a founder of the Mutoid Waste Company. The installation transforms discarded machinery and aircraft into imaginative works of large-scale environmental art.

The centrepiece was inspired by England's ancient Stonehenge monument and features two vintage Beechcraft aircraft buried in the red earth and arranged wingtip-to-wingtip. Rising above the surrounding gibber plains and sparse vegetation, the weathered aircraft create a striking and surreal contrast against the vast outback landscape.

Located near Alberrie Creek, approximately 30 to 40 kilometres west of Marree, Planehenge forms part of the broader Mutonia Sculpture Park, which includes other remarkable junk-art creations such as additional nose-diving aircraft sculptures, a giant pendulum and the famous Ghan Hover Bus. Together, these recycled industrial artworks have become a popular attraction for travellers exploring one of Australia's most iconic outback routes.