We visited Mount Gambier, South Australia, which is famous for it’s Blue Lake that changes colour to a brilliant blue colour in November and remains that colour over the summer each year. Since we visited in winter, the colour was not the same vibrant blue, but it was still interesting to visit the lake which is formed in a crater, and you could definitely see the difference in colour between the blue lake and the lake in the adjoining valley.
The sinkhole was originally on a private property, where the Umpherston family developed the gardens in the 1880’s. Umpherston Sinkhole was once a cave formed through dissolution of limestone and the sinkhole was created when the top of the chamber collapsed downwards. Now the topsoil down on the floor of the cave forms the perfect environment for the sunken garden.
Mt. Gambier is built on the slopes of an inactive volcano and features several other sunken cave gardens as well as nearby attractions such as Tantanoola Caves with it’s pink dolomite caverns. The area is known as the limestone coast and many buildings are constructed from blocks of local limestone, which makes it a most attractive town.