We stumbled upon this place on the Hop on Hop off tour. Very cool and a great way to learn about the US money system. Oddly enough we were to see Hamilton - the Play and made the connection between him as the picture on the US $10 bill and the story line of the play. Give it 40 minutes and you'll walk away glad you did. Warning - it is a US Government building so you do have to go through a short security scan/bag search.