Chicago was a stop off on a work trip.  We were on final approach to O’Hare and I was looking out of the window at the industrial areas that surround the airport.  There are rail tracks scattered throughout these areas so seeing trains is not a surprise.  However, I was a little caught out by what appeared to be some old Metra commuter cars parked up in one space.  They have clearly been out of use for a while.  If anyone knows who they belong to, please let me know.