Hidden beneath an unassuming cliff-face 20 minutes’ drive from Mount Gambier lies another magical cave adorned by stalactites and stalagmites. Once an ancient shoreline, the sea has long since receded leaving behind a 30-metre-wide chamber adorned with pink and brown dolomite crystals. Tantanoola Cave’s impressive interior has been thousands of years in the making with countless hanging stalactites and floor-to-ceiling crystal columns making it one of Australia’s most beautiful caves.