The Cu Chi Tunnels are 75 miles of interconnecting tunnels that were used by the Vietnamese armed forces in the Vietnamese War (or American War as they call it). They served as hiding spots and as routes for interaction and materials. Quite a few troopers even lived in these tunnels https://kylervyuol.idblogz.com/28720542/5-tips-about-sai-gon-list-you-can-use-today