There's a website entitled wheresgeorge.com. At it, you can enter the serial number of a dollar bill or other U.S. paper currency, then follow their travels.
It helps if you write wheresgeorge.com on the bill and the person who gets it enters its latest location.
I entered about ten bills. Four have been tracked and noted. One of them had a very interesting travel history.
I entered it into the wheresgeorge.com's tracking system on June 5, 2008. The next entry was made Sept. 6, 2009 in Reno, Nev. It had traveled about 1,800 miles during that time.
I also checked for bills that had been entered in the city of G., a nearby community where many of my friends and relatives live. One bill was entered into the system on June 30 of this year after it also had traveled about 1,800 miles.
It was first entered on July 3, 2007, in Corpus Cristi, Texas. The next entry was on May 14, 2009 in Myrtle Beach, S.C. It had traveled about 1,170 miles in a year and 10 months.
The next listed entry was on May 12, 2010, in Bloomington, Ind. the bill had traveled about 560 miles in a year.
Then it traveled the 60 miles from Bloomington to Greenfield in about a month and a half.