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, ...

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 ...

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 ...

The ancient city of Elengubu, known today as Derinkuyu, burrows more than 85m below the Earth's surface, encompassing 18 levels of tunnels. The largest excavated underground city in the world, it ...

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, ...

Underground cities have been around practically forever. The city of Derinkuyu in the Turkish province of Cappadocia, for example, was built between 2000 and 1000 BCE.

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 ...