They have some great museums. Alot of art. I went to the science museum in 2007 because they had the "Body Worlds" exhibit there.
http://www.bodyworlds.com/en.html
Kinda creepy but interesting. Since the exihibit tours I don't think its there now. There is also alot of coffee houses that have local bands come in and play. I had to stick to kid friendy activities when I was there so alot of the fun stuff I did not get to see.