The general width of Ontario Niagara falls exceeds 1200 m is a fifth falls in the world on width of front of falling water The mid-annual charge of a falls - 6010 cube. M, or 360600 ò in a minute, - it one of five most powerful on the Earth. The Most part of water is spent through the Canadian sleeve called Horseshoe. Last name precisely reflects the concave form of the Canadian part of a falls though there is also other name-Thunderer. Waters of the mighty river smoothly approach to a threshold and with majestic calmness fall in a chasm from height of the 20-storeyed house. In greater water thickness of a water stream on a crest makes some meters. The top of a water wall even seems motionless. The bottom part - deification of bubbling water. It boils and rages, forming huge whirlpools. Above abyss the veil of a water dust rises. In clear weather beams of the sun, refracting in the smallest drops of water, form seven-color rainbows. Them happen a little, it is frequent one inside of another. As well as at other huge falls, it is matchless a rainbow at night, in a view of the moon. Game of elements so impresses, that huge crowds of tourists hours observe it, not moving. Americans skillfully present a miracle of the nature. At Niagara tens projectors by the general capacity 1,5 million in kWt are established. A projector multi-coloured. As soon as will darken, their beams go on continuously moving wall of a falls and, creating fantastic illumination, strengthen and without that an impressive picture. Niagara, as well as any other falls, looks differently in dependence not only on time of day, but also on a season. In the spring and in the summer the boiling white curtain is shaded by juicy greens, in the autumn - crimson paints. Only edges of the river in the winter freeze. From rocks-ledges of a crest - gradually freeze huge, about a factory pipe, ice inflows - huge "icicles", sparking brilliants on a background of raging water. "Pipes" is not a metaphor. "Icicles" of many greater and small frozen more precisely, freezing falls represent really hollow inside, ice formations cone-shaped or extending from top to bottom through which transparent walls it is possible to observe as falls, pulses and fights, resisting to freezing, water. Behind a Ontario Niagara falls the river is narrowed almost in 10 times - up to 100 - 130 m and is born with huge speed. Academician I.E.Glueshchenko has compared waters of Niagara below a falls to herd of the wild horses swept manes from white foam. The wild gorge lasts on 11 km, further Niagara leaves on plain, its current becomes quiet, and it runs in r. Ontario. Niagara is glorified for the whole world, annually it visit up to 16 million tourists that brings to the tourist companies fabulous incomes. Around of Ontario Niagara falls hotels are constructed, motels, viewing towers, pendant road, have grown two cities under one name - Niagara - Folse, one of them Canadian, with 100 thousand inhabitants, another - American, with 50 thousand On both coast are built shtolns, their lifts lower the tourists preliminary dressed in rubberized raincoats, downwards, to the sole of a falls. Costing on special concrete platforms, being in any 1,5 m from a huge wall of a falling elements, observers test reverential horror before powerful, unrestrained forces of the nature... One of Ontario Niagara falls attractions is a legend about the Maiden of the Fog, ostensibly from folklore of Indians of a tribe Irokez, lived once in those places. As the Maiden of the Fog annually chose the most beautiful girl of a tribe and sacrificed to its god Manitou lived as Indians trusted, in abyss of a falls. The girl dressed in the best clothes, placed in special to a pie which lowered on water without oars above a falls. Also speak, the girl went on true destruction without a shadow of fear - so force of suggestion is great. In ecstasy the Maiden trusted, that sends towards to a deity. Once the choice has fallen on the daughter of the leader. Not in forces to bear separations from the favourite daughter, it has followed for it. Speak, that, having lost the best leader, the tribe in the further has refused barbarous custom. Ethnographers approve, that such legend was not at a tribe Irokez. Most likely, it has been thought specially up for entertainment of tourists. Even if and so, it at all does not belittle poetry of the legend and if legends were not, probably, it was necessary to think up it. Mark Twain wrote, that Niagara - "a great miracle of the nature, whose obedient servants - rainbows, whose voice - a thunder heavenly, whose frightening face disappears in clouds ". Many decades the competition of monopolies around of Niagara does not cease. The hydrobuilding companies aspire to use energy of a falls for construction of hydroelectric power stations, tourist - to keep the incomes. The companies maintaining thermal power stations compete to those and others. Conflicts reached court. In the USA and Canada on a mutual basis laws are passed, on which power stations can select no more than 27 % of water to not drain a miracle of the nature. Under agreement 1950, the prisoner between the USA and Canada, in the afternoon from April till October, ò. å. In peak of tourism to provide a sufficient curtain from foam, through a falls it should be dumped not less than 2700 cube km. In other months decreases up to 1350 cube km. At night water of Niagara collects in huge tanks - bunkers of special hydroheat-sink power stations. The Niagara breakage barred the way to Great Lakes to greater ocean courts. This lack has been compensated by bypass channels. In 1959 the sea ships for the first time have floated through r. St. Lavrentiy to Great Lakes.