Along the Argentinian–Brazilian border in South America the Iguazu River tumbles over 275 separate falls within a 2.7 km stretch. The highest fall is the Devil’s Throat at 82 metres, but on average the drops are in the region of 64 metres.
On the Canadian–USA border at Niagara the huge discharge of the Niagara River has shaped three falls: the American Falls and Bridal Veil Falls in the USA and Horseshoe Falls in Canada. At Niagara the height of the cliff is not particularly great and a hydroelectric power station now draws off about half of the river discharge, diminishing the erosive power of the falls.
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