I'm not familiar with anything called the "Chicago Catacombs" and I've lived and dived here for many years. There are some flooded light rail tunnels under the downtown area, but I've never heard of anyone but commercial divers going in them and I doubt rec divers would be able to gain access, let alone permission.
Many of the websites I listed have information about local diving, including the more popular wrecks. Remember the rule - the deeper they are, the more intact they are likely to be. Out of Chicago the hot "wreck" this year is the Straits of Mackinac", a recently scuttled former car ferry that sits in about 80ft of water. Otherwise, there is something for everyone. Also remember the water is cold - right now you'll be lucky if the water below the 50 ft thermocline is above 50F. Last weekend several days of SW winds blew all the warm water to Michigan and we were diving in water in the upper-30's again. The top-water is usually warmer, later in the season it can hit the mid-70's. Visibility thus far this year has been (relatively) terrific - I've seen lots of 40 - 50ft days and several more than 60ft. D#$% zebra mussels are good for something, at least.
Steven