In honor of the CTA asking select riders to be “Mystery Shoppers,” The Sun Times took their own mystery shopping trip, riding and evaluating 242 miles of L and subway track, and have created a list of best and worst L stops. The “Ghastliest” stop, straight out of a horror flick with dripping water, filth and bad lighting went to the Division Blue Line stop. "Prettiest" stop is the Green Line Conservatory/Central Park Drive......