This is a secret underground tunnel system used by the Vietnamese army during the Vietnam War. The video was shot at the Cu Chi tunnels in Ho Chi Minh City, Vietnam on September 11th

The video shows a series of tourists experiencing climbing down the secret underground tunnel with the width of only 1 person to get down. After going down the tunnel, the hatch is closed and you can hardly see it because the dry leaves are covered.

Cu Chi Tunnels is a legendary tunnel system with more than 220 km of tunnels.

The Cu Chi Tunnels network was built within 25 years.

Using this tunnel system, the military can easily communicate and travel from one village to another during the war. Also the home for thousands of soldiers. Which contains hospitals, schools, theatres, kitchens, and many other rooms underground.

It has many entrances. Most of them are covered with a secret wooden door and camouflage leaves above. They are small that the US army can not enter. These tunnels were built isolatedly and had different escapes out to the River, counterfeit bunkers, and booby traps. Besides, there are many skillful deadly and dangerous traps that were arranged to keep safe for those insides. The top of this building is also equipped with many holes, bell tunnels, minefields... to fight against the enemy.

Currently, about 120 km of the tunnels are preserved and work as a captivating attraction in Ho Chi Minh City