Funny, I live thirty minutes from the Denver mint and, admittedly, I haven't been there since grade school... :( In fact, the last time I was near the mint at all, I was busted via loudspeaker by the mint for standing on the short wall off 16th street to take a better photo of something. Freaked me out. I thought it was the voice of God or something, "Get off the wall!" :)
Really need to get back there and actually buy something.
As an interesting side story, my nine year old got a reverse field trip from the mint this year. Instead of busing all the kids down there, they had a mint employee come out and show them videos and pictures of how coins are made. They even got a 2013 shield cent and a 2013 shield planchet in a little blister pack type thing. Pretty cool!