Lake Erie drains into Lake Ontario through a 26-mile crevice known as the Niagara River.

About halfway between the lakes the land suddenly drops 167 feet and the water falling over this cliff forms the mighty Horseshoe Falls.

The steady flow of water never stops: 600,000 gallons per second, every day, every year, for centuries.

Here is eighty two seconds (49,200,000 gallons) of this ceaseless falling.