They're called the Cu Chi Tunnels, and tourists travel from around ... The National Liberation Front had meeting rooms and storage space for ammunition. They dug wells for fresh water and there ...

The base area at Cu Chi was a vast network, with nearly 200 miles of tunnels. Any facility used by the guerillas -- a conference room or training area -- had almost immediate underground access.

The base area at Cu Chi was a vast network, with nearly 200 miles of tunnels. Any facility used by the guerillas -- a conference room or training area -- had almost immediate underground access.