Mount Gambier's crown jewel, the famed Blue Lake/Warwar, was once an active volcano but today, molten rock has given way to a 72-metre-deep lake filled with cobalt blue water. It's lesser-known little cousin, aptly named Little Blue Lake, is equally as impressive - plus you can dive right into its depths. A favourite with the locals, this impressive swimming amphitheatre is surrounded by breathtaking sheer 10-metre limestone walls and boasts crystal-clear freshwater. Mount Gambier's wonders continue underground in the centre of town, where you can descend into a subterranean oasis at Umpherston Sinkhole/Balumbul. Here, you'll discover a beautiful sunken garden set in a collapsed limestone cave that is now blanketed with flowers, plants and lush green grass thanks to a few local green thumbs.
Southern Ocean Drive road trip: Mount Gambier to Robe
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