The Grant Region in South Australia is home to several fascinating caves and sinkholes. Some of the notable attractions in the area include Koonalda Cave, which has received a $400,000 heritage grant for conservation efforts. Piccaninnie Ponds feature underwater caverns like The Chasm and The Cathedral. Allendale East Sinkhole on the Riddoch Highway has a 35-meter underground system for divers. Caroline Sinkhole in Penambol Conservation Park offers walking trails and access for Cave Divers Association of Australia members. Kilsby Sinkhole is a popular spot for scuba divers and tourists, located on a privately-owned sheep farm.
Ewens Ponds Conservation Park presents limestone ponds with diving and snorkeling permits available through National Parks and Wildlife Services. Hells Hole offers a unique diving experience as a cenote exposing groundwater. Naracoorte Caves National Park near Naracoorte features fossils, bones, and dioramas of extinct animals. These caves and sinkholes provide insights into the region's geological history and offer diverse experiences for visitors, including divers, hikers, and nature enthusiasts.