The Limestone Coast's wide open roads lead to succulent seafood, unique wine, geological wonders and stunning coastal scenery. In Mount Gambier – South Australia’s second largest city – you’ll find the Blue Lake. Here, cobalt water fills a massive volcanic crater. Mount Gambier’s Umpherston sinkhole is a beautiful sunken garden, right in the middle of town. Spend some time at public art spaces, museums and galleries. You’ll find a vibrant mix of local pieces and international works with touring exhibitions sitting alongside permanent collections.