Harlequin lights splash Reed Flute Cave, one of Guilin’s prime attractions. Heavy rains filter through the valley floor and dissolve and erode the porous limestone as they gather in hundreds of underground channels.

National Geographic - October, 1979

Harlequin lights splash Reed Flute Cave, one of Guilin’s prime attractions. Heavy rains filter through the valley floor and dissolve and erode the porous limestone as they gather in hundreds of underground channels.

National Geographic - October, 1979

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