This idyllic Colorado mountain town floats at an elevation ... you know what you're getting into. With Silverton's high altitude, Colorado's elements are a powerful force, nothing to scoff at.

About 30,000 native trees, including dwarf birch and montane willows, are to be planted at around 600m (1,968ft) on Cairn ...

The Inca Trail in Peru is among the most popular ancient hiking routes in the world. The trail culminates at the UNESCO World ...

The páramo covers slopes above 10,000 feet in elevation all over the Andes Mountains, and acts like a giant sponge absorbing ...

In people not adapted to life at altitude, the sparse oxygen can impair fetal growth, causing issues that can last a lifetime ...

Closed for the winter, passes in the Swiss Alps are scheduled to reopen for car traffic within the next few weeks, weather ...