The state of Colorado, where I live, is landlocked, but we have lakes, rivers, and waterfalls. What we don't have is water the likes of which I saw at Niagara Falls.
Niagara Falls is a set of three waterfalls (Horseshoe Falls, American Falls, and Bridal Veil Falls) at the south end of the Niagara Gorge, which separates New York (U.S.) from Ontario (Can.). Horseshoe Falls is the most powerful waterfall in North America, with an average annual flow rate of 85,000 cubic feet per second.
I didn't spend any time below the falls, but I can tell you that the view from the top was absolutely mesmerizing.