Of all the different natural rock formations on Earth, arguably the most implausible-looking are the natural bridges and archways that form when wind or water erosion carves various pathways through ...

Arches National Park is a red-rock wonderland and geological playground boasting thousands of natural stone arches, soaring pinnacles, massive fins, and balanced rocks scattered across a dramatic ...

This archived news story is available only for your personal, non-commercial use. Information in the story may be outdated or superseded by additional information. Reading or replaying the story in ...