Union Falls in Yellowstone National Park. 15.6 miles - Moderate to Difficult. At a height of 260 feet, Union Falls is the second highest waterfall in Yellowstone. Its unique shape makes it one of the park's most picturesque landscapes. Combine this hike with a trip to Terraced Falls Trail and you'll enjoy a rewarding day in Yellowstone's Cascade Corner.
Minnesota’s Devil’s Kettle Falls has been puzzling hikers and geologists for generations. At the falls, along Lake Superior’s north shore, a river forks at a rock outcropping. While one side tumbles down a two-step stone embankment and continues on like a normal waterfall, the other side vanishes into a deep hole and disappears — apparently forever.