Visitors visit the Cu Chi tunnels, reportedly a 120-mile network of tunnels dug by hand beneath the U.S. military's 25 Division base in Cu Chi, 21 miles from Ho Chi Minh City, Jan. 27, 2008. For years, Viet Cong guerrillas lived in a network of tunnels three storeys deep, a labyrinth that spanned over 300 kilometres (186 miles), connecting villages in virtual underground cities north of Saigon. Today, they are a tourist trap. (Xinhua/AFP Photo) Photo Gallery>>>