Arguably the most famous waterfall on the planet, Niagara Falls is actually comprised of three separate parts. American Falls and Bridal Veil Falls are in New York, but the most famous section of the falls is located across the border. Canadian Falls — also known as Horseshoe Falls — drops 167 feet and stretches more than 2,700 feet across, according to World Waterfall Database. Visitors can even venture beneath the falls by boat on Maid of the Mist tours.