Located about 57km from Ho Chi Minh City, Cu Chi Tunnels is now a population spot for Vietnamese and foreign tourists. The network of 250km of tunnels spread like cobwebs underground and became legendary when they played a vital role in the war. In their heyday, the tunnels were functioning underground cities, including numerous trap doors, specially constructed living areas, storage facilities, weapons factories, field hospitals, command centers, and kitchens during the 1960s when Cu Chi was a (Free Target Zone).