Guizhou in southwest China is famous for its mysterious "tiankeng," which refers to deep sinkholes in the karst landform. Inside a tiankeng in Guiyang City, a waterfall bursts out from a cave on the cliff at the height of over 30 meters. Known as Yangpidong waterfall, it is rarely visited by tourists. Thousands of Pacific swifts will fly through the waterfall everyday, creating a stunning view.

(All photos via VCG)

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