I live near Chicago, in Northwest Indiana, and there's nothing ridiculously awesome to do here. As a remedy to that, I insist an adult recreational facility be created with awesomeness unparalleled. It will be a gigantic steel warehouse kind of building with soccer/football fields built in (yay astroturf), a gym, a hockey and ice skating rink, rock climbing and all of that fun stuff.
But here's the kicker: It will also house crazy-ass obstacle courses like those featured on MXC (Takashi's Castle), Wipeout, American Gladiators, and Ninja Warrior.
Outside there could be an obstacle course for cars (drifting, off road, whatever), a drag strip, and an area for other sports like that as well (dirt biking...)
It would be located in a more rural area, for an optimum amount of land for the facilities and parking, but it wouldn't be terribly hard to get it near a highway exit due to its overall location. Business would also be good because you could broadcast advertisements over Chicago airwaves.
The biggest issues would be funding and liability insurance, but oh god, this idea is sick.