i went to the natural history museum with my roommate and a guy friend who was in from out of town. we went the fourth of july weekend and i have never seen a museum more crowded. there literally was a line out the door to get in and a line to get into the cafeteria. that being said, obviously, the museum was really loud (although it's definitely not a quiet museum to begin with) and quite crowded. again i was reminded of how much i dislike that this museum charges a pretty high premium to get into its special exhibits. as an adult, it cost $15 to get in. To get into the special exhibits, tack another $11 onto that entrance cost. that's pretty steep! to give you an idea, the met charges $20 to get in, but doesn't charge to enter the special exhibits (that i've seen at least). we visited the dinosaurs, biodiversity hall, and the section about the earth (like fault lines, the formation of the earth, etc). times visited: 3 time spent in the museum: 2 hrs overall: