- There are incredible caves throughout Vietnam in areas like Lang Son, Cao Bang, Son La, and Ha Giang.
- Central Vietnam’s Karst region is about 300 miles from Hanoi. It contains magnificent limestone caves.
- Phong Nha-Ke Bang National Park is near Vietnam’s border with Laos and contains incredible limestone caves.
- The vast network of chambers that make up Hang Son Doong, or Mountain River Cave, are in northwestern Vietnam.
- When he was young, a man named Ho Khanh found the Hang Son Doong, or Mountain River Cave, network.
- Hang Son Doong, or Mountain River Cave, was formed between two and five million years ago. River water moving across limestone flowed down along a fault, forming a giant tunnel beneath the mountains.
- Although there are longer and deeper caves than Hang Son Doong, or Mountain River Cave, few other caves can compare to its giant passages.
- Hang Son Doong, or Mountain River Cave, contains trees that are one hundred feet tall.
- The cave pearls in Hang Son Doong, or Mountain River Cave, are huge: about the size of baseballs.
- Cave pearls form when a drop of water from the ceiling hits the limestone floor, throwing up a speck of rock. The grain of rock moves in its cup of stone every time a drop of water hits it. It takes thousands of years from the calcite pearl to form.
- The cave pearls in most caves tend to be about the size of a marble.
- It’s estimated that an entire New York City block would fit inside Hang Son Doong, or Mountain River Cave.
- The mud walls inside Hang Son Doong, or Mountain River Cave, are sticky and have been compared to the texture of peanut butter.
- Phong Nha-Ke Bang National Park attracts about a quarter million Vietnamese tourists every year.
- Around 90 miles of cave passages have been discovered in the rain forest along the Vietnam-Laos border.
April 04, 2013
World's Biggest Cave Facts