HALONG BAY, VIETNAM - APRIL 10: Cruising boats on April 10, 2011 in Halong Bay, Vietnam serving tourists to discover a 1553 sq. km UNESCO World Heritage Site consisting of 1169 islets of various size.
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HALONG BAY, VIETNAM - APRIL 10: Cruising boats on April 10, 2011 in Halong Bay, Vietnam serving tourists to discover a 1553 sq. km UNESCO World Heritage Site consisting of 1169 islets of various size.