For this contest, please enter your photos of karst landscapes around the world. Karst is where the rocks in the landscape have been shaped over thousands of years by the dissolving action of water mainly on carbonate bedrock such as limestone, dolomite, or marble. Your images can show any of the features of a karst landscape whether above or below the surface of the ground, including sinkholes, caves, impressive towers and pinnacles. Colour or black and white images are welcome.
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