An underground tunnel network long rumored thanks to drawings by Leonardo da Vinci under Milan’s Sforza Castle are proven to ...

Majid Labbaf Khaneiki is one of a handful of experts helping bring 3,000-year-old underground aqueduct technology, called qanats, to the modern world. Early qanat tunnels, which were built ...

"Left largely intact," the plan reads, "the tunnels between offer opportunities for art and light installations ... included. An underground bathhouse by Platte Architecture + Design ...

Atelier XÜK has completed the Huanglong Mountain Zisha Mineral Source Museum "The design appropriately ... on the ground floor and the underground mine tunnel into one complete space," it continued.

The ceremony marked the start of digging the two horizontal tunnels, reaching 165 feet below the surface, that will connect to Sound Transit's Beacon Hill light rail station at Beacon Avenue and ...

In the mean time, you can visit other underground tunnels in the UK. The London Postal Museum is home to an 100-year-post train underground which kids can ride. And Western Heights, in Dover ...