Sorry sorry sorry!!! I honestly am trying to think of something cool, but challenging, but not TOO challenging. Argh!
I really liked the historical marker, but thats done!
Okay, this may be lame, but here goes -
Find a hardware store that is NOT a chain (no Lowes, Home Depot, etc) and take a pic of your bike in front of it. MUST BE an independant, local owned kind of thing.
You know what I'm talking about - the kind with penny candy on the front counter, wrenches, wooden rat traps and rope in the aisle and nails by the pound in open bins in the back. If it sells dog feed or bird food out of open bins with scoops, thats a bonus.

On your mark, get set - GO!