Where is it: East Gippsland, a four-hour drive from Melbourne.
The cave: The Buchan Caves are a set of limestone caves on Krauatungalung Country that have to be seen to be believed. They are a significant cultural site for the Gunaikurnai Traditional Owners and researchers have dated the caves back to the Devonian period (300-400 million years ago) when they were formed by underground rivers cutting through layers and layers of limestone rock. Visitors can get up close with the calcite-rimmed pools of Royal Cave and the incredible stalactites and stalagmites of Fairy Cave, which make up the Buchan Caves Reserve. Guided tours are conducted daily, with all caves fitted with walkways and lighting for easy wheelchair access.
While in the area: Spring Creek Walk is a great way to see limestone and volcanic rock without having to go underground. Keep an eye out for echidnas, lyrebirds and wallabies on this trail.