Sure you can shore dive why not? I have we also have cruised the harbors as well.
As far as ship wrecks and such I think there are some planes and ships up near waukegan, IL. (sp) out off of the great lakes Naval Training Center they were used to trane pilots for landings and take offs of carriers before the fellas went overseas, WWII.
Berrys scuba is one place that comes to mind for more info or just google.
I know you did'nt ask but, a cool place to check out in MO. (IL.-MO. border) is Bonaire mines (sp) we did that place years ago as well as a lake up near Beloit, IL. Beloit has a plane a 2 seater I think but the vis is 5 feet or less at times(well at least it was when I was there) great place to use nav. skills.
Bonaire is an old mining place that was flooded and it stays a constant 52-3? water temp. year around and is great year around fun, the caves are cool but if your claustrophobic think this one thru first..it does get very, very tight.
There are a lot of diff. dive shops in IL. which should have wreck site maps as I said before Berrys comes to mind I would start there and I think I remember seeing some site maps and at the times I also remember people getting together and chartering for wreck/pleasure dives.
The great lakes get cold below 20-30 feet, have fun pee suit needed

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GO SOX1
