Kilsby Sinkhole is one of those places that barely looks real. The water is insanely clear – like glass – and it’s known as one of the best sinkhole dive spots in the country. Whether you're keen to snorkel, freedive, or scuba (you’ll need your Open Water cert for that), all visits are with a licensed guide and all the gear is provided. It’s actually the only privately owned sinkhole in Australia that opens to the public, which makes it feel even more special. There's also accommodation available here if you're planning to stay a little longer.

If you prefer staying out of the water, you can opt for a sinkhole tour to learn more about this landmark.