I forget how BIG the Washington, DC Mall is. On my last day visiting out east over the winter holidays, my friend B and I went to the Mall. Above is the Smithsonian National Museum of Natural History (DINOSAURS!), then the National Gallery of Art and then the Capitol Building. We went to the National Gallery first because they opened late at 11 am, while the Smithsonian was opening some buildings at 1 pm.
Looking the other way, the Washington Monument, the National Museum of African American History and Culture, and the National Museum of American History.
The museum buildings are each two city blocks long and a city block wide. They are enormous. We only went through part of the National Gallery and then ducked in to Natural History. There are now 23 buildings, including the National Zoo, in the Smithsonian. It is amazing and wonderful. And there are other museums as well, including the National Gallery of Art.
The Smithsonian: https://www.si.edu/museums.
The National Gallery of Art: https://www.nga.gov/.
They are SKOOKUM museums.