How deep is the water at the base of Niagara Falls?

The water at the base of the Horseshoe Falls (the big one) is about 170 feet deep. That’s roughly the height of a 17-story building. Don’t let the churning white foam fool you—it’s a massive plunge pool carved out over thousands of years. The American Falls side is shallower, maybe 20-30 feet at the

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