This is the back side of Downtown Auto Body (which is not downtown, really, but behind Holton and Townsend). There used to be a train track along the area at the bottom of the photo, and until the mid-1990's, the Circus Train from Baraboo, WI would stop right there and unload all the circus paraphernalia to head down to the parade site. This was quite a spectacle. This mural, painted last year, commemorates that time. It's really much nicer looking than in my poor photo. You will just have to go see it for yourself.
These tracks were removed a couple of years ago after becoming an attractive place to dump mattresses and construction debris, and a weird curvy trail that appears to be some kind of meandering bike path that goes nowhere was laid down. Stray cats use it, too.