You have finally arrived! If you are similar to the 28 million people who visit each year, you are now gasping in amazement at this stunning panorama. Niagara Falls consists of three cascades separated by Goat Island. The two on the left are within the United States. The largest one at the end is in Canada. Collectively, more than 750,000 gallons of water flood over the cliffs per second. This is the highest flow rate in the world. The trio are formed by the Niagara River as it travels 35 miles from Lake Erie to Lake Ontario. Geologists estimate the falls are 10,000 to 12,000 years old. They were formed during the North American ice age called the Wisconsin Glacial Episode. The Great Lakes were also created during this period.