Grandma's Postcards
Union Station, St Louis, Mo. -- 36
Union Station, St. Louis, MO.
Located at 18th and Market Streets.  The largest in the world.  Covers 11 acres.  All trains into and out of St. Louis arrive and depart at Union Station.  The grand central hall has a floor area of 8800 square feet.  The power house, which supplies power, heat, etc., to the station, covers ten acres.