Muggles from nearby businesses and traffic make this challenging on stealth, possibly best done as a night cache. Stay tuned for a night specific cache to be placed nearby to help increase the value of a night trip downtown if you don't already live close.
One of those that make you say "DOH!" when you finally find it unless you've seen a few of these before, in which case you'll just have to negotiate the muggle challenge to make the grab.
Congrats to the snowlight on FTF!
gur PB'f wrefrl # jura ur cynlrq sbbgonyy jnf 55 naq va ynpebffr vg jnf 8...naq fbzrubj sebz nyy gung ur perngrq n gnt anzr.