Don't swim anywhere near where the waterfall hits the plunge pool. Churning currents called hydraulics can trap you under water. River currents everywhere are stronger than you may realize. Never enter the water anywhere near the top of a waterfall.
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You get wet. It's like a shower. Of course, if the water fall is too large… the weight of the water hurt you, can knock you to the ground, smash you into rocks, push you into the water, damage your eyes, make it hard or impossible to breath, etc….
Never drink water from a natural source that you haven't purified, even if the water looks clean. Water in a stream, river or lake may look clean, but it can still be filled with bacteria, viruses, and parasites that can result in waterborne diseases, such as cryptosporidiosis or giardiasis.
A retrospective analysis of 101 patients who survived vertical deceleration injuries revealed an average fall height of 23 feet and 7 inches (7.2 meters), confirming the notion that survivable injuries occur below the critical threshold of a falling height around 20-25 feet [1].
Niagara Falls FactsThe sound of the Falls has been described as thunder, and is caused by air bubbles breaking as they are slammed up and out of the water. The plunge pool beneath the falls is 35m(100 feet) deep. It is estimated that Niagara Falls erodes at the rate of 1foot per year.