President Cristina Kirchner toured the famous Cu Chi tunnels while on a state visit to Vietnam over the weekend. The tunnels, used by Viet Cong forces during the Vietnam War, proved to be a nightmare for U.S. soldiers throughout the conflict.
You can read more about the tunnels here. As noted in a Widipedia entry:
“The 75-mile (121 km)-long complex of tunnels at Củ Chi has been preserved by the government of Vietnam, and turned into a war memorial park. The tunnels are a popular tourist attraction, and visitors are invited to crawl around in the safer parts of the tunnel system. Some tunnels have been made larger to accommodate the larger size of Western tourists, while low-power lights have been installed in several of them to make traveling through them easier and booby traps have been clearly marked. Underground conference rooms where campaigns such as the Tết Offensive were planned in 1968 have been restored, and visitors may enjoy a simple meal of food that Viet Cong fighters would have eaten.”