The crusher pit tunnel at White Star Quarry is deemed 'off limits' but is accessible. From what I understand the park district decided it was more dangerous to block it off because it would be more dangerous for those divers that would go in anyway.
It does not 'snake' around. It is square (Maybe non-square but definitely rectangular). The angle is like a genlty sloping giant sliding board.
The 'house' that was mentioned is at the bottom of the tunnel. But it can be accessed at the top, too. Gotta get out either way.
If you decide to go in you should have a dive light with you. You can't see from one end to the other. & there may be other divers you would 'bump' into.
There isn't as much to see at White Star as Gilboa but it has it's good points. The water stays clearer than Gilboa. It does get silty but it settles down fairly quickly. There are boats, a Frito Lay truck, a motorcycle, the crusher pit (deepest spot in the quarry I believe), a police car, refridgerator, a flat bed trailor, bicycle, a buoyancy course (plastic piping formed into diamond shapes floating at different depths), and a couple very nice platforms. There are some 'hills' of rocks that are good practice for buoyancy. The two entries are nice. & it's a shorter drive for me!
Hope that helps.
Paula