Once a month
get new photos
and expert tips.

Science and Space
Main Health and Human Body Earth Space Prehistoric World A-Z

Photo Gallery: Mountains

PREVIOUS7 of 8NEXT


At 14,494 feet (4,418 meters) above sea level, California's Mount Whitney is the highest peak in the lower 48 states. Whitney is part of the Sierra Nevada, a fault-block mountain range formed when shifting tectonic plates led to the cracking and faulting of the Earth's surface. Photograph by Galen Rowell