Exploring underground cities ensures a unique glimpse into the past and an exciting adventure for those willing to delve ...

The team of Italian researchers first claimed to have discovered a vast underground city below the Khafre pyramid in March, ...

Explore Tokyo’s Underground Temple—an epic flood control facility with towering columns, massive tunnels and a cathedral-like ...

Researchers claim to have found a second underground city beneath Giza Pyramid, revealing what may be part of a vast ...

The discovery of a second underground "hidden city" in Egypt linking the Giza pyramids has the potential to rewrite history.

So has Sezin Nas, a researcher of interior architecture and acoustics at Istanbul Galata University. The ancient, underground city of Derinkuyu caught Nas's eye early on. Located in modern-day ...

Russian airstrikes, the residents of Kharkiv are trying to preserve a sense of normalcy. Much of daily life has now moved ...

The city of Pasadena in California is undertaking a massive public infrastructure project that will see all of its overhead utility lines buried underground, but the work will take another 500 ...