XINHUA PHOTOS OF THE DAY

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BEIJING, May 4, 2019 (Xinhua) — Photo taken on May 2, 2019 shows the Blue Lake near Imotski, Croatia. Lying in a deep sinkhole, the karst lake in southern Croatia has changed into a rare blue color this week because of heavy rains and sudden flow of underground water. (Xinhua/Ivo Cagalj)