"Oh, GO PLAY IN TRAFFIC!"
How many times did I hear that from my teachers, my companions, my MOM? I couldn't tell you... but now I'm telling YOU the same thing -- go play in traffic!
This is a "dead drop" micro hidden downtown in a VERY busy area, between two buildings where my wife spent a lot of time. Hopefully this search won't prove as frustrating for you as those years did for her!
You will need to bring a writing utensil. Now please... use some common sense in your search, and do watch for cars!