Dude some of the best museums in the whole world. 1. Air and Space museum, National Mall 2. Air and Space Museum, Dulles 3. Freer Art Gallery, National Mall- some of the rarest artifacts from nepal 4. Natural history museum, National Mall 5. Holocaust Musuem, National mall (i recommend you to go if you want to be depressed) 6. The Washinton Monument for the birds eye view whole washington, southern Maryland and Nothern Virginia. Good thing about the museums in DC is they won't cost you a dime. Enjoy :>