Cu Chi Tunnels is the famous revolutionary historical vestige and the network of underground dugouts over 200 km long in Saigon. Hard to imagine how the Viet Congs lived inside the tunnels for 10 years performing all the activities such as meeting, cooking, dining and of course fighting. Perhaps it's a clear message to the world that a firm will and determination conquered all. Glad that the war was over for 30 years and these tunnels now turn into a popular sites for tourist. Must go if you're around especially if you're curious about how and why the US Army suffered in the battle expected to be a victory but turned out to be a nightmare.