#karst lakes
The Blue Lake near Imotski, Croatia.Lying in a deep sinkhole, the karst lake in southern Croatia changed into a rare blue color because of heavy rains and sudden flow of underground water. (Xinhua/Ivo Cagalj).
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The Blue Lake near Imotski, Croatia.Lying in a deep sinkhole, the karst lake in southern Croatia changed into a rare blue color because of heavy rains and sudden flow of underground water. (Xinhua/Ivo Cagalj).