Discover the best top things to do in Quang Binh Province, Vietnam including DELUXE SMALL Group Tour: Phong Nha Cave And Dark Cave 1 Day, PRIVATE Paradise Cave & Dark Cave Full Day Trip, Phong Nha Cave And Paradise Cave Tour, PRIVATE PHONG NHA CAVE -DARK CAVE 1 DAY TRIP FROM DONG HOI or PHONG NHA, PHONG NHA CAVE- PARADISE CAVE FULL DAY FROM DONG HOI or PHONG NHA, Phong Nha Cave And Dark Cave Tour.
The karst formation of Phong Nha-Ke Bang National Park has evolved since the Paleozoic (some 400 million years ago) and so is the oldest major karst area in Asia. Subject to massive tectonic changes, the park’s karst landscape is extremely complex with many geomorphic features of considerable significance. The vast area, extending to the border of the Lao People’s Democratic Republic, contains spectacular formations including 65 kilometers of caves and underground rivers.
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