Located within a native forest reserve, Hell's Hole is an impressive sinkhole that extends into open water. It drops 30 metres to the water and has a view like no other cenotes in the region. It was formed when the roof of the cave weakened and collapsed to the bottom.
A short 750-metre loop trail has been established at Hell's Hole for public access. This trail meanders through native vegetation along reasonably flat sandy tracks, however, there is a slight incline leading uphill to the cenote. Less than halfway into the walk, you will find an obscure turnoff to an extremely secure observation platform. Views of the cenote from here is just spectacular. You got to see it to believe it. Occasionally, you might also spot a diver or two in the water.
Getting to Hell's Hole is easy and doable with a 2WD. From Mount Gambier, take the main road towards the Victorian border but turn left into Sea Coast Hill Road at Caveton. You will then see the Hell's Hole information sign on your left after about four kilometres down the road. Car parking is available at the forest gate.