The Cactus to Clouds ascent just outside Palm Springs, Calif., is grueling, but natural treasures, and a speedy trip down, ...

How do volcanologists determine the height of eruptive plumes from Yellowstone’s past explosive eruptions? Ironically, you ...

If you love mountain roads with tight turns, check out this scenic drive known as the "Oh-My-God Road" for its wiggy curves, ...