.
.Congress Park is the 10th stop on the BNSF line to Aurora. But on weekdays if you catch the 1265 in Union Station at 5:17 PM, you'll get here in just 16 minutes. Also on weekdays there are four morning rush hour trains that will take you non-stop from here to Chicago Union Station in under twenty minutes.
Enter either side via the tunnel.
Note: 3/25/11 - The old Brookfield Moose building was just recently demolished. A construction fence has been placed in front of the property, blocking access to the original cache, an Airborne container. A new cache has been placed nearby. Now you are looking for something much smaller. Usually plenty of muggle traffic nearby. Please use the hint and do your business without drawing attention to yourself.
This is another in the Commuter Series started by e-lo wa-ya in the north suburbs. Feel free to add to this series, just start the name with "Commuter Cache:"