A 121 km long system of tunnels and underground rooms created for defensive purposes in the late 1960s – 1970s.
|Location, GPS coordinates:||11.0624 N 106.5282 E|
|Categories:||Fortresses and forts, Tunnels, Rock cut architecture and sculptures|
|Rating:||(2.5 / 5)|
|Where is located?||Asia, Vietnam, Southeast, Ho Chi Minh City, Củ Chi District|