Home of Son Doong, the world’s largest cave, plus Paradise Cave and boat trips into the river cave of Phong Nha itself.
Row through limestone karsts and rice paddies on the "Ha Long Bay on land", then climb to the Mua Cave viewpoint.
Limestone-cliff beach reachable only by longtail boat, and the best rock-climbing spot in Southeast Asia.
Paddle lakes, islands, boreal forest, and northern waterways in Voyageurs National Park.
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