How was Niagara Falls formed?: Media
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Niagara Falls
One of North America's most famous natural spectacles, these waterfalls sit on the...
Scenics of America/PhotoLink/Getty Images
Niagara Falls and the Niagara River
The water first poured over the Niagara Escarpment near present-day Lewiston, New...
Encyclopædia Britannica, Inc.