All ten entries were verified as operating in fall 2026. Pass requirements are noted for each; hours and pass rules change — confirm on official sites before you go.
1. National Museum of African American History and Culture — 1400 Constitution Ave NW, National Mall — nearest Metro: Smithsonian (Blue/Orange/Silver, Mall exit), ~5-min walk — Free (advance timed passes required; book at nmaahc.si.edu, weeks ahead in peak season) — 5 underground floors cover slavery through the present; Harriet Tubman's shawl, Muhammad Ali's boxing gloves, original Pullman railcar; hardest reservation in Washington DC
2. National Gallery of Art — 6th St & Constitution Ave NW (West Building); 4th St & Constitution Ave NW (East Building) — nearest Metro: Archives-Navy Memorial (Green/Yellow), ~3-min walk — Free (no passes, walk-in anytime) — only Leonardo da Vinci painting in the Americas (Ginevra de' Benci); two buildings connected by tunnel cover Renaissance to contemporary; Mon-Sat 10am-5pm, Sun 11am-6pm
3. Lincoln Memorial — 2 Lincoln Memorial Circle NW — no convenient Metro (Foggy Bottom is a 20-min walk; most visitors take rideshare) — Free (no passes, open 24/7, staffed 9:30am-10pm) — marked 'I Have a Dream' granite step; Gettysburg Address and Second Inaugural inscribed inside; most powerful at sunrise or after 10pm
4. National Archives — 700 Pennsylvania Ave NW — nearest Metro: Archives-Navy Memorial (Green/Yellow), 2-min walk — Free (timed tickets encouraged during busy season; walk-up usually fine fall-winter) — original Declaration of Independence, Constitution, and Bill of Rights displayed simultaneously in the Rotunda; open 10am-5:30pm daily
5. National Museum of Natural History — 10th St & Constitution Ave NW, National Mall — nearest Metro: Smithsonian (Blue/Orange/Silver, Mall exit), ~5-min walk — Free (advance timed passes required; book at si.edu) — Hope Diamond (45.52 carats, blue), Sant Ocean Hall with 45-foot North Atlantic right whale model, dinosaur fossil hall; 10am-5:30pm daily
6. National Air and Space Museum — 6th St & Independence Ave SW — nearest Metro: L'Enfant Plaza (Smithsonian Museums exit), ~5-min walk — Free (advance timed passes required; book at si.edu) — July 2026 renovation completed the 50th-anniversary overhaul; final two gallery groups opened October and November 2026; essentially all-new inside as of fall 2026
7. Library of Congress (Thomas Jefferson Building) — 101 Independence Ave SE — nearest Metro: Capitol South (Blue/Orange/Silver), ~5-min walk — Free (advance timed passes required at loc.gov; closed Mondays) — Great Hall with mosaic floors and bronze railings; Gutenberg Bible on permanent display; visitor gallery above one of the most beautiful rooms in the United States
8. Hirshhorn Museum and Sculpture Garden — 700 Independence Ave SW — nearest Metro: L'Enfant Plaza (Smithsonian Museums exit), ~5-min walk — Free (no passes required; note: closed Tuesdays, noon-5:30pm Monday, 10am-5:30pm other days) — best contemporary art collection in DC; Warhol, Koons, Louise Bourgeois; outdoor Sculpture Garden reopened fall 2026 after a 3-year revitalization
9. United States Botanic Garden — 100 Maryland Ave SW, foot of Capitol Hill — nearest Metro: Federal Center SW (Blue/Orange/Silver), ~5-min walk — Free (no passes, walk-in, 10am-5pm daily) — year-round tropical conservatory with rare orchids and Jurassic-era plants; most underrated free stop in DC; best in winter when the greenhouse is in full bloom and outdoor parks are bare
10. National Portrait Gallery and American Art Museum — 8th & F St NW, Penn Quarter — nearest Metro: Gallery Place-Chinatown (Red/Green/Yellow), 2-min walk — Free (no passes required; 11:30am-7pm daily) — only place outside the White House where the full sequence of presidential portraits is displayed; folk art and craft collection in the same building