The Cu Chi Tunnels were a system of tunnels 65km northwest of Saigon. The complex system of tunnels, which at the height stretched over 250km, allowed guerrilla fighers to launch sudden attacks on the US troops and ARVN troops and to withdraw safely.

Several large-scale military operations by the US and ARVN troops to destroy the tunnels, but to no avail. Visiting these tunnels, learning about the tricks and the history certainly makes your day an interesting one.