Amaging world's massive son doong cave

Hang Son Doong, a 3-million-year-old cave in the central part of Vietnam and the largest known cave passage cross-section in the world.

This cave is also known by a variety of biological landscape. explorers discovered a primitive forests with rich vegetation, there has never been human traces. Experts have called the forest even in this cave is the “Garden of Eden” in honor of the sheer beauty of this aesthetic.

Inside, the cave has its own environment – animal life, lakes, beaches, trees and a river and also a rare pearls that have been shaped by water drops for centuries and some of them are as big as baseball.

Stretching more than five kilometers (three miles) long and reaching heights of 200 meters (650 feet), the main cavern of Hang Son Doong is large enough to house an entire New York City block.

it was first discovered in 1990 by Ho Khanh, a local farmer who was seeking shelter from a passing storm in the jungle. He noticed clouds and the sound of an underground river gushing from a large hole in the limestone, and reported his findings to the British Caving Research Association (BCRA), who were stationed in Phong Nha at the time.