It all began 12,000 years ago when a huge trench was carved to create this spectacular natural wonder. At the time, the Falls were about 7 miles down river in the Lewiston-Queenston area. In their present position, the Horseshoe Falls (170 feet high and 2,500 feet wide) on the Canadian side and the American Bridal Veil Falls are eroding at the rate of about 6 feet each year. Together, they pour about 200,000 cubic feet of water every second over the brink.