Archaeologists in Croatia have reopened a 2,000-year-old hidden tunnel at the ancient city of Salona, revealing Roman amphitheatres.

Hidden under Rome’s streets, ancient aqueducts, quarries, catacombs, and bunkers reveal a layered city still operating below ground.

History buffs and lovers of unique experiences have the chance to walk through the same underground path once secretly used by emperors beneath Rome’s iconic Colosseum. The Commodus Passage is named ...

Add Yahoo as a preferred source to see more of our stories on Google. An image collage containing 2 images, Image 1 shows Aerial view of the Capitoline Hill in Rome, Italy, Image 2 shows Piazza del ...

The Great Sphinx of Giza continues to spark imagination as researchers and alternative theorists debate its hidden tunnels.

Excavations led by the Chinese Academy of Social Sciences (CASS) have revealed a vast network of underground tunnels beneath the 4,500-year-old city of Houchengzui, located in northern China’s Inner ...

CNN’s Ben Wedeman was given an exclusive tour of ancient tunnels underneath Rome’s Capitoline Hill. The tunnels, which archeologists say were once filled with ancient Roman shops and taverns, are set ...