From a passageway made by giant sloths to a slinky tunnel bridge and an 'entrance to hell' - there are some extraordinary ...

In a groundbreaking discovery, scientists have uncovered evidence of a mysterious interstellar tunnel that appears to connect two galaxies. This finding, revealed through advanced X-ray ...

A tunnel network with mysterious origins that locals refuse to speak about is nestled in a European city. The Fishbones is an underground tunnel network which runs under the Croix-Rousse hill in ...

Experts surmise that these tunnel systems vary in sophistication. Some are manually dug to escape detection, and their slender passageways limit the movement of soldiers within them. The emergence ...