For thousands of years, the Great Sphinx of Giza has guarded Egypt’s most famous monuments. But beneath its surface lies a mystery that researchers still debate. Hidden shafts and sealed passages have ...

Sometimes, or maybe a lot of the time, Orono can feel like a small town off in the middle of nowhere; a place where not much happens. It may be surprising to some that there is a legend on the ...

The US government has been secretly digging tunnels for decades, with some speculating that they are being used to hold alien or UFO material.

Deep beneath the hillsides and suburbs of Brazil, there are tunnels so vast and regular that they look like abandoned subway lines. Their walls are smooth, their ceilings arched, and in some cases ...