I never see anything good. Occasional wrappers from candy, road debris left over from winter, and dead animals. I guess people around here are too conservation minded and don't throw stuff out of the window.
The only time we found something was when we had to pull over on the sidewalk for my husband to adjust something on his bike. It might have even been on a walk, I can't remember. Anyway, we found a wallet. So we got home and searched the woman on Google. She had moved from the address on her license, but she still lived in Boston. When Steve called her, she was so happy; she was leaving the next day on a business trip to Europe and had no ID, so she drove out here to get the wallet. I think when she saw my husband, she thought she might get a date, but then I came to the door...
She had stopped to fix a flat and her wallet dropped out of her jersey. She rewarded our honesty by giving us a gift card to Starbucks.