Here I stand in a dugout area of one of the original tunnels. Behind me is the entry to the top level of the tunnel network. There are actually 3 levels of tunnels at differing depths. The first level contains small rooms for eating and sleeping. The second level is used for travelling underground to the outer edges of the area. The third level is used mostly for escape routes and usually end up at the Saigon River where the men could swim out into the river.