Cool adventures in IL?

There's Starved Rock which is south, passed Joliet. Besides that there isn't much nature worth exploring. In the city there are plenty of places to check out if you're into urban exploration. Kinzie St bridge, Sky Factory, basically the entire south side.
 
Believe it or not I've found some cool abandoned stuff by googling abandoned - of course it most likely not pinpoint exact address but sometimes you can put things together and find it - use different words too to mix it up. Found info on reddit too. Just found an abandoned miniature golf course in pensacola when I go there soon. Yay for urban explore!!