Once you've had a few chances to drink in the awesome beauty of the falls, take a look at another awesome aspect of the mighty Niagra: its use for hydroelectric power. Half of the water flowing over the falls is diverted for the U.S. and Canadian hydroelectric power plants, and another 25% diverted at night and turned back on in the morning. You won't see the change in flow at night, as it is done after the lights illuminating the falls are turned off, but you can see the falls get turned on at 8am when the intake tunnels are closed. The Canadian power plant offers an interesting guided tour. The original Canadian plant was built not long after the engineering triumph of Panama Canal, at a time when the use of electricity was still a novel idea. Since then, the U.S. plant and a second Canadian plant was added, necessitating the 1950 Niagara Diversion Treaty to protect the beauty of the falls. For more information about the falls, including a 1969 photo of the American Falls when the water was completely diverted, look at http://geocities.com/falzguy.geo/some...