Inventing Niagara

Americans call Niagara Falls a natural wonder, but the Falls aren''t very natural anymore. In fact, they are a study in artifice. Water diverted, riverbed reshaped, brink stabilized and landscape redesigned, the Falls are more a monument to man''s meddling than to nature''s strength. Held up as an example of something real, they are hemmed in with fakery -- waxworks, haunted houses, IMAX films and...