Elon Musk’s Boring Company plans a privately funded tunnel in Nashville to connect downtown and the airport, promising ...

It's official. Elon Musk's The Boring Company plans to build a high-speed tunnel from Nashville International Airport to ...

Elon Musk speaks during an unveiling event for the Boring Company test tunnel in Hawthorne, California, on Tuesday, 18 ...

Israel is considering flooding Hamas' underground network of tunnels in Gaza with ocean water as part of its plan to completely decimate the group, according to a report.

An underground tunnel network has been around for decades and according to the Israeli Defense Forces, is how soldiers, weapons, and other goods move freely through Gaza.

Researchers believe that the tunnel system was an underground representation of the above-ground street network of the ancient Incan city of Cusco. Located about 130 miles from Machu Picchu, Cusco ...

The home was near the center of the site and linked to a network of underground tunnels, archaeologists said. The hidden tunnel network extended for about 160 feet and had five different rooms.

That ancient tactic of going underground is still very much in use, so much so that the U.S. military has increased its focus on fighting in tunnels, one of the most dangerous forms of warfare.

As Israeli troops advance through Gaza, their target is elusive and dangerous: The Hamas tunnels. The underground network includes military headquarters, sleeping areas and workshops to make rockets.