Today Teena and I were heading over to the Chicago River to go on an Architectural Boat cruise and came upon the Nicholas J. Melas Centennial Fountain. It was built in 1989 as a tribute to a huge engineering marvel. At one time the Lake Michigan emptied into the Chicago River, but in 1889, a wall was built to hold back Lake Michigan, and canals were built to basically reverse the flow of the river.
You can stand under the middle section of the main falls.
It's a beautiful fountain and if in Chicago, it is worth going to see.