1. All of America's money "paper" has been produced by Crane & Co. of Dalton, Massachusetts since 1879.
Before winning the 1879 contract, the Crane family was already famous for selling 13 reams to Paul Revere in 1770. However, the paper's actually a blend of cotton and linen.
2. Within the Treasury Department, the Bureau of Engraving and Printing (BEP) is responsible for all paper money and all their engravings are still done by hand.
Employees generally apprenticed for 10 years, and their works are protected by BEP police (the Secret Service only handles forgeries). The whole department specializes in history: Engraving tools are inherited from previous BEP artists, and the new $100 introduced in October 2013 contains a portrait of Franklin from 1992 while the Independence Hall design on the reverse dates back to 1929.
3. There's more Monopoly money than U.S. currency.
Parker Brothers prints 30 billion Monopoly dollars every year while the BEP only churned out $974 million in 2010 — 95% of which was used to replace old bills.
4. Unlike rare coins, $2 bills are rarer than other bills, but are not worth more than their face value.
5. The most valuable bill the U.S. ever printed topped out at $100,000.
It was only printed in 1934 and featured Woodrow Wilson.
6. Making a penny (street value: 1 cent) costs the U.S. Mint 1.4 cents to make.
7. By adding your dollar bill to or checking in on one already registered with WheresGeorge.com, you can plot out a bill's journey across the U.S. (and sometimes the world).
8. Of the seven men on American bills in circulation, only Alexander Hamilton and Benjamin Franklin never served as president.
They're on the $10 and the $100, the fourth-most and most valuable bills.