The Củ Chi tunnels are located outside of Ho Chi Minh City in a large forested/jungle area. This is a historical site dating back to the Vietnam War, housing the tunnel system used by the Viet Cong against American forces. The tunnel system is immense, including tunnel networks stretching several kilometers long and stories deep. Included in this tunnel network are bunkers, underground bomb-making facilities, water supply system tapping into underground rivers, etc. The entire area was once boobytrapped using numerous styles of traps. At the modern-day facility, these traps have been replicated for visitors to view and are operated to show their effect. The tunnels have been reinforced and expanded so as to allow visitors to travel through them and really experience how vast these networks were. Also located on the premises is a very impressive shooting range with a vast array of guns to fire. I personally chose to use a jeep mounted M30 machine gun, which I was able to fire down a range at targets. The main weapon to be found in plenty is the AK47 in numerous models. The tunnels are a must visit if you find yourself in Ho Chi Minh City.