The true magnificence of these historic fortifications is only revealed from the sky

A Marquette tour guide tells us about copper mining in the Upper Peninsula — which dates back 7,000 years at the Porcupine Mountains and Keweenaw Peninsula.

Some of the tunnels in the 3,500-year-old mine are so narrow it's believed they must have been carved by small children.

Who is responsible for a massive and mysterious copper operation that historians believe predates the Bronze Age?

Pioneers and early archaeologists credited distant civilizations, not Native Americans, with building these sophisticated complexes

Hidden markings and secret codes on a late 1500s map of eastern North Carolina may hold clues to unlocking the mystery of the Lost Colony.