Arches National Park is seeking public comment on its Visitor Access and Experience Plan, including its two-year timed entry pilot project.

These giant rocks could roll at any moment. The fact they haven't offers a window into the shaking of ancient Earth.

These giant rocks could roll at any moment. The fact they haven't offers a window into the shaking of ancient Earth.

This advertisement has not loaded yet, but your article continues below. Images of the tests showed what appeared to be a BMW sedan being destroyed and old models of tanks being blown up More than ...