Palouse Falls is one of these floods’ last and most magnificent remnants. The powerful 200-foot tall waterfall is impressive in itself, but its surroundings help to add to the magic.

One of the most stunning remnants of that Ice Age resculpting is the 186-foot-high Palouse Falls. "Sometimes the Palouse Canyon is called the Grand Canyon of Washington state," Stoess said.

A 40-year-old hiker was killed over the weekend when he slipped and plummeted down the side of a mountain in front of his wife and five children near Oregon's Multnomah Falls, officials said.

The hike in question is the aptly named Trail of Ten Falls, a moderate loop with an elevation change of around 800 feet. Although I’m far from a hardcore hiker, especially by Oregon standards ...