So much to see! I was visiting Pittsburgh for a weekend and was wondering around, looking at downtown and my future school, CMU, when it started raining. I ducked in here, not really knowing what it was and what to expect.
I've only made it through 3/4 of the first floor but you can easily spend an entire day here and it might not be enough. I visited the architecture, gems and stones and rushed through the dinosaurs.
None of the exhibits were too crowded (on a Sat!) , you could browse in peace and not feel rushed.