Cu Chi Tunnels: According to the website, the tunnels’ manhole-size entrances, hidden under fallen palm fronds, have currently been widened for the tourists. |
| The newspaper noted the tunnel, built by the Viet Cong (South Vietnamese liberation fighters), are famous for its tiny dimensions. |
| ‘Parts of the tunnel system were like little subterranean cities with factories, kitchens and hospitals’, says Daily Mail. |
| These pitch-black tunnels were used as living quarters, hospitals, supply routes and storage during the war. |
| Catacombs of Paris - France |
| Bounce Below - Llechwedd slate mine, North Wales |
| Salina Turda – Romania |
| Cabinet War Rooms - London |
| Coober Pedy - South Australia |
| Salt Cathedral - Colombia |
| Wieliczka salt mine - Poland |
| The Vaults, London |