Koonalda Cave is one of those spots that totally catches you off guard. You’re driving through the middle of the Nullarbor — like, properly flat, dry, endless plains for hours — and then suddenly, out of nowhere, there’s this massive sinkhole in the earth. Like, huge. It’s honestly wild. You’d never expect something like this to exist out here, and that contrast makes it even more epic.

Standing on the edge, looking down into this gaping limestone cave, you get this eerie, goosebumps kinda feeling. It’s super remote, super quiet, and the sheer scale of it is a bit mind-blowing. The cave holds deep cultural and historical significance too — it’s a sacred site for the Mirning people and one of the oldest known Aboriginal archaeological sites in Australia. So please, tread respectfully.

It’s totally free to visit, and pet-friendly if you’ve got your pup with you (though probs best to keep them well away from the edge — it’s not fenced and it’s a long drop).

Pair it with a stop at the nearby Koonalda Homestead (also abandoned and full of retro charm) and you’ve got yourself a proper outback adventure. Just make sure you’ve topped up on fuel, water, and a good sense of direction. It’s raw, it’s rugged, and it’s one of those places that stays with you.