The second tallest of the Seven Summits, Aconcagua sits deep in the Andes on the western edge of Argentina. At 22,841 feet, simply standing on top is a benchmark for high-altitude alpinists.

North America's deepest gorge, Hells Canyon, which slithers along the border of Idaho and Oregon, is a surprisingly new ...

National Geographic photographer Keith Ladzinski focused on the positive when it came to forest fires: the solutions people are working on.

A huge mass of rock and ice from a glacier thundered down a Swiss Alpine mountainside, sending plumes of dust skyward and ...

A huge mass of rock and ice has caused damage near a village in the Swiss Alps that authorities evacuated earlier this month ...

On Wednesday, a landslide from the mountain side of Birch Glacier -- located in the Lötschental valley in northern ...

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