For under the Smithsonian banner are 19 world-class museums, 9 research centers, and the National Zoological Park. Its collection of some 140 million spans the entire world including artworks, scientific specimens, artifacts, and other objects. So large is the collection that only one percent is on display at any given point.
The Smithsonian Institution includes such popular attractions as the National Air and Space Museum, the National Museum of African Art, the Freer Gallery of Art, the National Museum of American Indian, the National Museum of American History, the National Museum of Natural History, and the Smithsonian American Art Museum and National Portrait Gallery.
The Institution also includes low-key but fascinating collections in the Anacostia Community Museum, the Arthur M. Sackler Gallery, and the National Postal Museum. All the museums have stunning permanent collections, but always be on the lookout for temporary exhibitions.