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The region in the southeast of South Australia, near Mount Gambier, is littered with many volcanic and karst features such as volcanic craters, lakes, limestone caves, water-filled caves and sinkholes. One particular sinkhole, located just off Jubilee Highway East, is particularly worth visiting. What was once a typical limestone cave formed by the corrosion of limestone rocks by seawater, and the subsequent collapse of the chamber’s roof, has been transformed into a beautiful garden.

umpherston-sinkhole-2

Photo credit: njbawden/Flickr

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