Deep in the untouched jungle, we take on an ambitious challenge: digging and building a secret underground tunnel house, ...

This is the hardest, slowest way to dig a tunnel through a mountain. It would take you more than 80 years to dig a mile-long tunnel with hand tools!

Deep underground, a construction crew is hard at work. They are digging a two-mile-long tunnel to help keep millions of gallons of raw sewage out of nearby waterways. And they have a lot of help ...

Digging a tunnel underneath a body of water is tough going! The ground here is a gooey, soppy mess! Choose a tool or technique below, and try to figure out the best way to dig a tunnel through the ...