It's free (if you don't take a tour) and you get to see some great examples of US government architecture. Stars are beautiful, but to tell the truth I don't really understand them very well. Don't get me wrong, I wish I did. I like enjoying them as they are and I've resigned my understanding of the cosmos to what I can get out of PBS documentaries. The buildings that house these telescopes however are great examples of the U.S. Government Building category--and that's what I'm into. There's a smell to them. That smell and feel is a part of my Introduction to America.