(1) It's free, can't beat that. (2) The art is nic...

(1) It's free, can't beat that. (2) The art is nice, I guess - I'm not really qualified to comment on it, but there were a number of names I recognized, so that must mean it's a solid collection. (3) Even if you aren't into art, there are amazing views of the city, and the building itself is an architectural wonder. This place is worth it to kill a couple hours, at the very least.