Beneath your feet lie entire cities carved into rock, from ancient underground metropolises to modern hidden networks. These real underground cities once housed thousands and are packed with ...

Shanghai engineers are using 432 walking robots to relocate a complex, preserving Shikumen architecture while creating space ...

RÉSO in Canada can be considered one of the most modern underground cities in the world. Stretching over 20 miles under the city of Québec, ...

In a world where cities are growing faster than ever and the demand for digital connectivity, clean water, and sustainable energy solutions is rising, the future of infrastructure lies not […] ...

An underground city that once housed 20,000 people lay abandoned until a man followed ... Inside the subterranean city — whose entrances connect to more than 600 private homes in the modern, ...

The underground city in Naours has around 300 rooms and 28 galleries, and hosted up to 3,000 people at one point. The modern city of Naours only has a population of 1,200. Read More: 5 Ancient Cities ...

Built in the 1970s, the shops helped to cement Crystal City’s then-reputation as a modern underground city. From Wikipedia: Crystal City’s Crystal Underground shopping mall opened in September ...

To see one of the world’s biggest collections of site-specific contemporary public art, go underground into America’s busiest transit system. More than 400 life-size mosaic, glass and other ...

The ancient, underground city of Derinkuyu caught Nas's eye early on. Located in modern-day Turkey, Derinkuyu was built underground to defend against invasion, protect its citizens from harsh ...