Millions of tons of debris collapsed off Sheep Mountain in Teton County into the Gros Ventre River 100 years ago, creating a ...

HIT — It’s looking like a three-peat for Lake Oroville. As of noon Friday, the largest earth-dam lake in the United States was less than one foot from the top. It’ll get there; it’s just a matter of ...

An artificial lake building up behind the rubble left by a glacier that dramatically plunged down a Swiss mountainside, ...