Today my family and I visited the Smithsonian National Museum of African-American History & Culture in Washington, DC. It was a great experience! I thought the historical portion of the museum was particularly well done. The highlight for me was the casket of Emmett Till, which people lined up to view, as if at a funeral service. It was extraordinary.
The museum also features a fascinating set of exhibits on African-American culture, including a wing devoted to fine art. I was especially impressed by two landscapes by Robert S. Duncanson (1821-72), an African-American painter influenced by the Hudson River School of grand, romantic vistas. One is "Robbing the Eagle's Nest," which you can see here: https://nmaahc.si.edu/object/nmaahc_2009.13ab . The other, "Garden of Eden," apparently reflects Duncanson's hope for a more just America. You can see it here: https://nmaahc.si.edu/object/nmaahc_2014.299?destination=explore/collection/search%3Fedan_q%3Deden%26edan_local%3D1%26op%3DSearch . (I'm not sure whether the images are in the public domain, and the museum didn't permit photography of the fine art, so I'm just providing links.)
There is a ton to see in this awesome museum! Here's one more example: Chuck Berry's Cadillac. How cool is that?