From The Daily Journal (Kankakee, IL):
Visitors hear the falls long before they see them. Each second, 74,000 gallons of water rush at 40 mph toward the brink and thunder over Niagara Falls.
The water of the Niagara is not only noisy, it is beautiful. On a sunny day, the current roils to reveal forces of crystal, Caribbean-blue water. On a cloudy day, the palette darkens to a deeper blue, similar to a summer sky at magic hour. It’s the limestone that keeps the water clear; the limestone escarpment that follows the Niagara starts way back along the central section of the Mississippi River. We see it above ground in the bluffs and caves that line Midwestern waterways. Reportedly it goes underground to rise again out east. Or so I have been told. There’s plenty of folklore and facts about the great falls found on the border between Ontario, Canada, and New York State.