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 |
| Values: | History, Architecture |
| Rating: |  (2.5 / 5) |
| Where is located? | Asia, Vietnam, Southeast, Ho Chi Minh City, Củ Chi District |
