"Without that closed off, you'd be seeing 100-degree temperature air just flowing right through here, ripping in and making this no longer an ice cave," Wallace said ...

For some particularly suffocating horror, brave players should give these games taking place in various underground settings ...

Archaeologists have uncovered a system of tunnels underneath Troy which supplied water for the inhabitants of the city.

Experience Mt Titlis in Engelberg, Switzerland—a peak adventure combining scenic views and glacial wonders. Ride the TITLIS Xpress to the middle station, then ascend to 3,062 meters aboard the ...