Stock Photo - Laos: The famous Pak Ou Cave, 25km northwest of Luang Prabang on the Mekong River, illustrated by French expeditioner Louis Delaporte in May 1867.

Stock Photo: Laos: The famous Pak Ou Cave, 25km northwest of Luang Prabang on the Mekong River, illustrated by French expeditioner Louis Delaporte in May 1867.

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