Example of how they hid the air holes needed for the tunnels. They utilized the numerous termite mounds to camouflage them.
Cu Chi Tunnels and the American War
“Twenty years from now you will be more disappointed by the things that you didn’t do than by the ones you did do. So throw off the bowlines. Sailaway from the safe harbor. Catch the trade winds in your sails. Explore. Dream. Discover.” ~ Mark Twain
A Note From Abroad 
