A visit to the Grand Canyon National Park in the USA state of Arizona is a must for travelers from all nations. One of the Seven Natural Wonders of the World, the canyon was carved by the Colorado River.
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.