Discover the best things to do on the Limestone Coast The Limestone Coast is home to some of South Australia’s most spectacular natural wonders and world-famous wagyu beef. In the heart of Mount Gambier discover the aptly-named Blue Lake and the underground oasis, Umpherston Sinkhole. Snorkel or dive the crystal-clear waters of the Kilsby Sinkhole or Piccaninnie Ponds or snuggle up glamping under a blanket full of stars. Top it off with wine from over 40 cellar stunning cellar doors steeped in history and taste the flavours of Mayura Station Australia’s premium, boutique beef producer. Fly directly to Mount Gambier from Adelaide with Rex.