Ewens Ponds is a series of three water-filled limestone sinkholes on Eight Mile Creek 25 kilometres (16 mi) south of Mount Gambier and 8.4 kilometres (5.2 mi) east of Port Macdonnell, South Australia. The ponds are popular with recreational divers due to underwater visibility of up to 80 metres (260 ft). It has a large fish population including the endangered golden pygmy perch.