It may take 2 visits because it is so much to see. We didn't get to see everything, but we were there for 3 hours.
We have 6 levels of galleries. The duration of your visit depends on how much you would like to read and see. Sincerely, NMAAHC
I agree, it could take 5 to 8bhours to follow see and absorb it all. 3.5 hours is a good amount of time to get a treat overview
You can't do it all in one day even if you weren't from open to close non stop and actually appreciate it. I think it requires multiple trips. Go knowing you want to convert a certain time period and appreciate all it has to offer
2.5 hours to explore
It takes about 2 hrs per floor to do it completely which is 8 hrs.
It really depends on your walking speed. Don't fret, they won't kick you out directly at closing. They'll give you a bit of time after closing to finish up
Thanks! Your answer is awaiting moderation.