Less than 10% of the water flows over the American Falls, with the balance flowing over the Horseshoe Falls. It is the massive volume of water that flows over the Horseshoe Falls that gives it its green color.

The average depth of the water below Niagara Falls is 170 feet (52 meters), which is as deep as the Niagara Gorge banks are high.

The American Falls is 180 feet (55 meters) high. Its brink is 1,100 feet (330 meters) long. From the Falls, the water travels down the Niagara River to Lake Ontario, then to the St. Lawrence Seaway and finally to the Atlantic Ocean.

The Canadian Horseshoe Falls is 170 feet (52 meters) high. Its brink measures 2,500 feet (750 meters).

Niagara Falls is one of the world's most popular honeymoon destinations.

The water that flows over Niagara Falls comes from four of the five Great Lakes.

Originally, 202,000 cubic feet per second (6060 cubic meters) or 5.5 billion gallons (2.09 trillion liters) per hour of water flowed over Niagara Falls; now, however, half of this water is diverted for power by the United States and Canada.

Niagara Falls is the largest producer of electric power in the world.

Formed 12,000 years ago, the Falls were originally 7 miles (11.2 kilometers) down river at Lewiston/Queenston.

Through the years, the brinks have eroded, sometimes as much as 6 feet (1.8 meters) per year, to their present site.