This UNESCO-listed underground city in Poland hides 245km of tunnels, a cathedral carved from salt and an entire world below the surface |
A 245km network of tunnels distributed over nine levels hides one of Poland’s most astonishing works of architecture and life. While visuals might deceive you into believing it’s some grand mall, what truly lies in front of the eyes is an underground city made up of salt, which is one of the best-kept secrets about…