Every time I head back to my hometown, there are three things I always try to do – spend time with my parents, pay my grandparents a visit, and dive in for a snorkel at Ewens Ponds, the underwater oasis on Boandik land and one of many sinkholes around Mount Gambier.Ewens Ponds are three connected, limestone-fed sinkholes in the middle of Eight Mile Creek about 20 minutes out of Mount Gambier. Each of the ponds is surrounded by native reeds and linked with garden-laced channels, making it a bloody spectacular freshwater snorkelling route.These aren’t the only sinkholes around Mount Gambier! Check out Piccaninnie Ponds for more sinkhole snorkelling.