There is something about Niagara Falls that appeals to the lover, daredevil and poet in everyone. Over the years Niagara Falls has been many things—a strategic military post, a prosperous trade center, a seedy carnival town—but never has it ceased to be a natural wonder, mesmerizing travelers from around the world.

The cities of Niagara Falls, Ontario, and Niagara Falls, N.Y., are connected by two bridges across the Niagara River. The river is really a strait that acts as a spillway, carrying drainage from the upper Great Lakes to Lake Ontario. At the falls its sudden drop creates one of the world's most spectacular waterfalls. Among the shortest rivers in the world at 58 kilometres (36 mi.), Niagara also is one of the wildest: Its rapids reach speeds of 48 kilometres per hour (30 mph).

The Canadian Falls, 54 metres (177 ft.) high, have a crest of more than 675 metres (2,215 ft.) outlining a deep curve—thus the name Horseshoe Falls. The river underneath is as deep as the cataract is high. The American Falls are higher, at 56 metres (184 ft.), but are only about 328 metres (1,075 ft.) wide in a fairly straight line. The smallest of Niagara's falls, Bridal Veil, is separated from the other falls by Luna and Goat islands. The falls are illuminated nightly. During the past 12,000 years—the approximate age of the falls—the crest has moved 11.2 kilometres (7 mi.) upstream.

Water is being diverted more evenly over all three cataracts to protect the soft shale and limestone foundations and to slow the rate of erosion. The combined flow of the river over the three falls would normally be about 3,700,000 litres (977,540 U.S. gallons) per second, but the use of the waters to generate electricity reduces the flow to about 2,842,400 litres (750,960 U.S. gallons) per second. During the summer tourist season water is diverted only at night to ensure the beauty of the falls is maintained.

Settlement of the area began after the American Revolution when pioneers emigrated to Fort George at Niagara-on-the-Lake. The only European visitors were French trappers, explorers and missionaries. Though admired by passers-by, the falls were not a tourist attraction. In 1795 the government of Canada declined to spend $30 to clear a trail to the falls, in the belief that “nobody wanted to see them but small boys.”

Development of the area was thwarted by the War of 1812, which pitted settlers across the borders against each other. The bloodiest battle of the war occurred in Niagara Falls at Lundy's Lane. Though neither side claimed victory, this gruesome fight was the turning point of the war. Shortly afterward, the war ended in a draw: The Treaty of Ghent, signed on Dec. 24, 1814, reinstated the boundary line—creating sister cities on each side of the river.

The railroad brought the first influx of tourists about 1840, and Niagara Falls turned into a carnival of hustlers and freaks. In 1885 the Ontario Legislature established The Niagara Parks Commission to preserve the integrity of the land on the Canadian side of the falls. This agency is responsible for the well-manicured parklands along the Niagara River, which reserve the most beautiful views of the falls for the public's peaceful enjoyment.

The 20th century heralded the era of daredevils. In 1901, Mrs. Annie Taylor, a 63-year-old schoolteacher, became the first person to go over the falls in a barrel. She was fished out after 3 hours, battered and bruised but still alive. Many followed her over the brink. For the few who made it, there were many who did not. All went over the Canadian Falls, and those who died were usually trapped beneath the tons of water pouring over the crest. Fortunately the era of daredevils has largely ended; stunts on either the falls or the rapids are illegal.

There is no question that the Niagara Falls region is a mishmash of images. In some respects it resembles a sideshow with its wax museums, honeymoon specials and souvenir shops; conversely, it is a well-preserved park where man-made attractions are dwarfed by those of nature. To honeymooners, the city is an exotic destination, yet Niagara Falls is essentially a commercial metropolis.

As long as the falls exist, the tourists will keep arriving—more than 11 million people visit the Canadian side annually. On any day of the year countless shutterbugs jockey for position against the railing, just inches from the magnificent crest, in the hope of capturing the beauty, power and majesty of the falls. If they are lucky, a rainbow will appear in the mist, adding splendor to splendor.