Noticed that a US single I rec'd as change was marked "Track this bill at www.WheresGeorge.com"

Checked it out and sure enough it was registered and found that "This bill has travelled 1,663 Miles in 1 Yr, 179 Days, 19 Hrs, 26 Mins at an average of 3.1 Miles per day. It is now 1,663 miles from its starting location."