The Blue Lake
Mount Gambier's remarkable Blue Lake earns its name from the vivid colour it takes on between November and March each year. During the cold months, the lake looks like any other, before bursting into bloom in late spring. Why the change happens remains a mystery. One theory is that the warmer weather heats the water and the fine calcite crystals at its surface; the crystals absorb all but blue light and the effect is enhanced by the reflection of the summer sky. Another theory is that it is caused by a seasonal build-up of fluorescent organic matter. Whatever the reason, the effect is stunning.
The lake is 75 metres deep and 20 metres lower than Mount Gambier's city centre. The city itself is perched, amazingly close, above the lake. The best view is from the top of the mount, but it can be appreciated from anywhere around its 3.5 kilometre circumference. The Lady Nelson Visitor Information Centre in Mount Gambier can give tourists more tips about viewing the lake, as well as information about the region's many other attractions.
Learn more about the Blue Lake.
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