Bureau of Engraving and Printing, Western Currency Facility, Fort Worth, Texas (click here for more info)
Today I visited the Money Factory. Unfortunately, no cameras are allowed inside the facility so I have no pictures. The free tour lasts about 45 minutes and it is truly fascinating. The process of making and printing money is extremely complex. During the tour you watch money being printed as you walk along an enclosed elevated walkway that takes you through every step of the process. There is also a film, gift shop, and museum.