Mount Gambier is a city with 26,148 inhabitants in the southeastern corner of the Australian state of South Australia and is about halfway between Adelaide and Melbourne .
Mount Gambier is known for its volcanic maar lakes on the Mount Gambier volcano of the same name , especially the "Blue Lake". In the warmer months, this lake takes on an intense, unnatural-looking blue color, which is said to be due to a change in the refraction of light caused by the tiny ascending mineral grains of calcium carbonate . There are also numerous sink holes in Mount Gambier and the surrounding area , which were created by the geological process of karstification , a leaching of limestone by water. These forms of landscape are mostly made into a tourist attraction as a walk-in garden.
In addition to timber and agriculture, tourism is the region's most important source of income.
There are numerous sights nearby. About 20 km south of Mount Gambier are the Ewen Ponds, three up to 15 m deep crystal clear freshwater ponds that are used by the locals for diving. Further south on the coast is the sleepy town of Port Mac Donnald, the home port of Australia's largest lobster fleet.
sons and daughters of the town
Sir Robert Helpmann (1909–1986), stage and character actor, dancer and choreographer
