Archaeologists discovered ancient docks and artifacts from a submerged 2,000-year-old city believed to be an extension of ...

Unknown: The Lost Pyramid is the first in a series of four feature-length documentaries under the Unknown name. The films follow scientists as they make discoveries in unexplored, or at the very ...

The unknown tunnel had never been explored before, so the two cavers decided to take a leap of faith. The passage led to another room — with centuries-old artifacts inside.

"Unknown New York" offers a fresh perspective on exploring the city with lesser-known attractions.