While "best" is subjective, Niagara Falls in New York remains the undisputed heavyweight champion of American waterfalls due to its sheer power and volume, discharging over 3,000 tons of water every second. However, for sheer vertical beauty and a "wild" national park experience, Yosemite Falls in California is often cited as the best. It is one of the tallest in the world, dropping a total of 2,425 feet in three spectacular sections. In 2026, the "hidden gem" favorite for many is Havasu Falls in the Grand Canyon, Arizona, famous for its vivid turquoise water against red sandstone cliffs, though it requires a difficult 10-mile hike and a competitive permit. For a tropical experience, Akaka Falls in Hawaii offers a lush, 442-foot plunge through a rainforest. If you prefer a coastal vibe, McWay Falls in Big Sur is one of the few "tidefalls" that drops directly into the Pacific Ocean. Ultimately, Niagara offers the most "grandeur" and tourist infrastructure, while Yosemite provides the most iconic "Alps-style" mountain scenery in the United States.