I agree that walking liberty is one of the best designs on a US coin.
Another of my favorite is the eagle landing on the moon from the Ike dollar (which is based on the Apollo 11 insignia) I was living in Florida at the time and visiting the Kennedy Space Center (I still call it Cape Canaveral). I two way radio programmed with the frequencies (receive only) used by Nasa so we could listen in the shuttle launches. Minor fringe benefit from when I was working for Motorola.
Ken