Caves are pretty fascinating places, and larger caves might be even more interesting. In any case, this huge cave system has ...

Now, a sobering simulation has been created which shows exactly what happened to John Edward Jones, who suffered what many ...

No one knows how big the underside is. More than 365 miles of the five-level cave system have been mapped, and new caves are continually being discovered. Two layers of stone underlie Mammoth's ...