While hiking through the woods, we unexpectedly found what looked like a simple pit in the ground—but when we threw a rock inside, the echo told a different story. This cave is at least 150 feet deep, ...

Carved into the rock beneath a Swedish city, a huge man-made cave system dating back to the Cold War is being used to heat ...

This massive underwater volcanic tunnel features lava caves, lakes, a concert hall, and a fascinating blend of subterranean ...

Avowed features 12 cryptic Treasure Maps that lead to exquisite gear. Here's the exact location of each Treasure Map and all ...

Deep under the Chihuahuan Desert is a natural wonder, a cave filled with beautiful giant crystals, but which also happens to be a potential death trap.

There are plenty of things that want to kill you in the Darién Gap. Dehydration, starvation, and getting lost are the least ...

The machinery and rock cutters are so advanced that they can cut huge rocks and boulders within ... The construction company's team has gone inside for assessment and it is verifying, they said.

Now in the arid badlands of Shatterscarp, the Envoy has reached the beleaguered town of Thirdborn and re-established contact with Yatzli to find A Path to the ...

I spent an afternoon going deep underground at Glenwood Caverns in Glenwood Springs, Colorado. Here's why everyone should ...

A group of hikers were baffled to stumble across a wayward dustbin lid on their trail - but they were even more astounded to ...