Watch as we build an incredible underground cave house, complete with a beautifully decorated private living room! Using only ...

This home in Kent might look unassuming, but it’s hiding a labyrinth of subterranean tunnels that descend 50ft below the ...

The term “iceberg home” describes houses with elaborate lower levels like the Kansas City home of Chiefs player Travis Kelce.

Beneath the surface there are shops, churches, houses, schools, libraries and there is even an underground cemetery.

Not so much a man cave but a man aircraft hangar ... to have adopted the all-encompassing subterranean “Iceberg House” – a must-have accoutrement for his sprawling 17,000-square-foot ...

In Tom’s Working Mine on the highway, we had a first-hand experience in how Opals are traced and extracted, both by modern ...

Mariam, a 9-year-old girl, carries her brother as she stands with other children at an underground ancient cemetery in Jabal al-Zawiya in the southern countryside of Idlib, Syria, November 26, 2014.

Cave houses dot the landscape of Guadix, a small Granada town, in Andalusia. Discover how they got constructed, and why the area is a must-visit.