Uncover the hidden marvels of the world with our exploration of six secret underground cities. These mysterious cities reveal ...

Some citizens in Europe have created safe spaces in their homes while the EU has urged people across the bloc to prepare ...

The galleries of Monte Soratte, or more commonly Sorarette bunkerare considered one of the most impressive military ...

A mysterious, unidentified structure near Egypt's Khufu Pyramid has sparked online speculation. Discovered via Google Maps, theories about its purpose range from secret military installations to ...

Norway's proximity to the USSR in the Cold War led to it building many military bunkers – some of them vast secret bases.