The Piccaninnie Ponds Conservation Park is located in the south-east of South Australia in the gazetted locality of Wye on the continental coastline overlooking Discovery Bay about 490 kilometres (300 mi) southeast of the state capital of Adelaide and 30 kilometres (19 mi) south-east of the city of Mount Gambier.
Piccaninnie Ponds is a popular site for both snorkelling and cave diving. In 1964–1965, prior to its proclamation as a national park in 1969, underwater explorer Valerie Taylor described the ponds as "one of the most beautiful sights in Australia" and said that the crystal clear water gave her a feeling of unhindered flight. It contains three main features of interest to cave divers. The ‘First Pond’ is an open depression about 10 metres (33 ft) deep with a silt floor and vegetated fringe supporting much aquatic life. The ‘Chasm’ is a sinkhole with a depth of over 100 metres (330 ft), and the ‘Cathedral’ is an enclosed area with limestone formations and a depth of about 35 metres (115 ft). Underwater visibility is excellent and may exceed 40 metres (130 ft). Snorkelling and cave diving at Piccaninnie Ponds is by permit only.