In 1993, researchers exploring a cave in southern Italy found a sinkhole leading to a tunnel. At the end of the tunnel was a ...

There are plenty of natural wonders in the world that are actually incredibly dangerous. The Blue Hole of Santa Rosa, for example, is an unassuming New Mexico lake that's actually a death trap, hiding ...

Can you imagine a place on the Earth, where fire burns into complete darkness and fumes and you get killed just by breathing the air as you get in? This might just look like a scene from a fiction ...