Covering some 200,000 square kilometres across two states, Australia’s Nullarbor Plain is the world’s largest exposure of limestone bedrock. It’s also – at a cursory glance – a flat, arid, treeless expanse that appears to offer little to look at or stop for.
Of course, that’s only a surface-level analysis. Dig a little deeper (both literally and figuratively) and an entire world awaits in the form of underground tunnels and caves.
Within the unfathomably large slab of 50-million-year-old limestone lies the Old Homestead Cave, a 34-kilometre-long tunnel of alien-like rock formations and crystal-covered chambers that stretch down for four stories. It’s the largest – though certainly not the only – cave system discovered in the area, and is a mecca for curious cave divers and geologists the world over.
The vast subterranean area was recently explored by the folk at Australian Geographic, whose intrepid photographers ventured down into its depths. The series is well worth checking out if you can’t make it to the Nullarbor yourself.
Photos: Alan Pryke