For the most picture-perfect trip to Colorado, visit one of the state's numerous pristine lakes with clear water. Here are ...

From Alpine ridges to cliffside trails and story-filled city loops, Europe’s most inspiring runs combine exertion and ...

Bizarre 'bleached' rocks on the surface of Mars suggest that the Red Planet was once a tropical oasis, a new study reveals.

The C&O towpath takes you from Georgetown to Great Falls Park, where the Potomac River runs wild and commuters, hikers and ...

Is cold weather getting you down, and you need an outdoor adventure in warmer climates? Here are five of the best parks that ...