The Smithsonian Natural History Museum is an enormous building. We never made it out of the section on minerals and rocks - it went on, room after room after room.
The National Museum of Natural History (NMNH) is part of the Smithsonian Institution, the world’s preeminent museum and research complex. The Museum is dedicated to inspiring curiosity, discovery, and learning about the natural world through its unparalleled research, collections, exhibitions, and education outreach programs. Opened in 1910, the green-domed museum on the National Mall was among the first Smithsonian building constructed exclusively to house the national collections and research facilities.