The US two dollar bill has Thomas Jefferson on the front, and the picture of the signing of the Declaration of Independence on the back. At one point, long ago, the back had a picture of Monticello, but I have never seen one of those.
If you ask at your local bank, chances are good that they'll have some, but you'll often get ones from 1976, as they printed up a big batch for the Bicentennial celebration. They stopped printing them for 30 years(!), although the low circulation meant that even the 30-year-old notes often look like new. They have since been re-issued in August of 1996, October of 2003, and lastly a larger printing of Series 2003A in 2006.
Part of the reason that two dollar bills are so rare is that in the 1950s they were a United States Note (as opposed to a Federal Reserve Note), and as such were not backed by the gold standard. There was a strict limit on how much money could be printed as United States Notes, and most of that money was printed as five dollar bills, leaving the two dollar bill a comparatively small run.
These are one of the more handsome US bills.