Is this a serious discussion? OKC would become the laughing stock of the country if this thing were built. It is like Chicago coming up with a giant fan (windy), or Memphis a gigantic barbeque stand.

To be a bit constructive though, a feature of some kind on, at, or even spanning the river would be great. How about a bridge/observation deck/restaurant in a modern style, similar to the new boathouses? Think of the Aquarium by Calatrava in Valencia, Spain or even the old LAX observation tower, but more updated. Doesn't have to be tall, but unique would be nice.