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1, 2 and 3 days in Washington: a computed itinerary
How many days in Washington? Wikidata's open snapshot records 24 notable attractions within 40 km of the center, and this itinerary spreads the 12 most famous over 3 days by pure geometry: Smithsonian Institution anchors day 1 with an article in 70 languages, and each following day starts at the most famous one left. The 3 blocks add up to 8.9 km in straight lines between stops.
Summary: how many days in Washington
| Day | Anchor (most famous of the block) | Stops | Combined path |
|---|---|---|---|
| 1 | Smithsonian Institution | 4 | 1.1 km |
| 2 | Arlington National Cemetery | 4 | 3.7 km |
| 3 | Galeria Nacional de Arte | 4 | 4.0 km |
The page is cumulative: 1 day in Washington covers up to the Smithsonian Institution block; 2 days in Washington covers up to the Arlington National Cemetery block; 3 days in Washington covers up to the Galeria Nacional de Arte block.
Day 1: Smithsonian Institution
4 stops, 1.1 km combined between them in a straight line.
| # | Attraction | Type | From previous (straight line) | From center | UNESCO |
|---|---|---|---|---|---|
| 1 | Smithsonian Institution | Museum | starting point | 1.1 km | - |
| 2 | National Museum of Natural History | Museum | 0.3 km | 1.0 km | - |
| 3 | National Museum of American History | Museum | 0.4 km | 0.7 km | - |
| 4 | Washington Monument | Monument | 0.5 km | 0.6 km | - |
Day 2: Arlington National Cemetery
4 stops, 3.7 km combined between them in a straight line.
| # | Attraction | Type | From previous (straight line) | From center | UNESCO |
|---|---|---|---|---|---|
| 1 | Arlington National Cemetery | Monument | starting point | 3.4 km | - |
| 2 | Lincoln Memorial | Monument | 2.0 km | 1.4 km | - |
| 3 | Vietnam Veterans Memorial | Monument | 0.3 km | 1.1 km | - |
| 4 | United States Holocaust Memorial Museum | Monument and Museum | 1.4 km | 1.0 km | - |
Day 3: Galeria Nacional de Arte
4 stops, 4.0 km combined between them in a straight line.
| # | Attraction | Type | From previous (straight line) | From center | UNESCO |
|---|---|---|---|---|---|
| 1 | Galeria Nacional de Arte | Museum | starting point | 1.5 km | - |
| 2 | National Air and Space Museum | Museum | 0.3 km | 1.6 km | - |
| 3 | National Museum of Women in the Arts | Museum | 1.5 km | 0.8 km | - |
| 4 | Jefferson Memorial | Monument | 2.2 km | 1.5 km | - |
What the data says about Washington
The snapshot records 24 notable attractions within 40 km of the center of Washington (38.8951 N, 77.0364 W), in United States: 16 recorded as museums, 9 as monuments and 0 carrying a UNESCO World Heritage designation. The most famous of the set is Smithsonian Institution, with a page in 70 Wikimedia project languages, followed by Washington Monument (70). The itinerary takes the top 12 of that ranking; the longest day adds up to 4.0 km between stops and the shortest to 1.1 km. Washington has 689,545 inhabitants in the GeoNames register.
Arriving by air
The closest airport with scheduled service to the center of Washington, per the open OurAirports register, is Ronald Reagan Washington National Airport (DCA), classed as a large airport, 4.8 km from the center in a straight line.
How this itinerary was computed
Assembly rule in Washington: the 24 attractions within the 40 km radius are ranked by documented notability on Wikidata (how many languages carry an article about the place) and grouped by a greedy algorithm: each day opens at the most famous one still outside the itinerary (Smithsonian Institution for day 1 in Washington) and picks up, one by one, the nearest to the last stop, up to 4 per day. The 9 tabled hops add up to 8.9 km, always in straight lines (haversine formula): street routes run longer. The best season to visit Washington is not here because it cannot be computed from these sources, and this site does not make up guidebook opinions.
Sources: Wikidata (CC0, snapshot of 2026-07-09) for attractions and notability; GeoNames (CC BY 4.0) for the center and population of Washington; OurAirports (public domain) for airports.
Last updated: · Methodology and sources