Washington is the rare capital where the best museums are free by act of Congress. Skip the Mall crowds for Smithsonian outposts nobody queues for, $3 half-smokes on 14th Street, and hilltop views over the Potomac that cost only a Metro fare.
Congress's own greenhouse at the Capitol's foot opens 10:00–17:00 daily, admission free, no tickets needed. The Jungle room's 24-metre glass canopy, a desert house of century-old cacti and an orchid collection of 5,000 plants stay warm all winter.
The most lavish interior in DC — mosaic floors, 23-karat gold leaf, the Main Reading Room dome — costs nothing. Free timed-entry passes are released online 30 days ahead; walk-ups are often available weekday mornings. Open Tue–Sat.
Six acres of Calder, Lichtenstein and Miró around a circular fountain, free and open daily. In winter the pool becomes an ice rink; the rest of the year the fountain rim is the Mall's best free seat. Jazz concerts Fridays in summer, no ticket.
A 12-acre Italianate park with the longest cascading fountain in North America, 13 basins dropping down the hill. Every Sunday since the 1960s a drum circle fills the upper plaza from mid-afternoon until dusk. Free, no schedule, just show up.
DC's last surviving 1873 public market. Market Lunch inside serves blueberry buckwheat pancakes for about $9 and a crab cake sandwich around $17; the weekend outdoor farmers' line sells $4 pastries and cheap seasonal fruit. Closed Mondays.
Open since 1958 and a survivor of the 1968 riots. The chili half-smoke — a smoked half-pork half-beef sausage under mustard, onions and chili — runs about $9.50. Chili dogs are cheaper; cash and cards both accepted, seating is diner stools.
A converted 1930s wholesale warehouse with 40-plus stalls. Under $12 gets you Filipino lumpia, Korean rice bowls, empanadas or a slice of Neapolitan pizza. Free seating throughout, and the rooftop is open to anyone without a purchase.
DC's Salvadoran heart, settled in the 1980s. Pupusas revueltas at spots along Mount Pleasant Street cost roughly $3–4 each and two make a meal with free curtido. Spanish is the working language; most places are cash-friendly and family-run.
The 1831 canal towpath starts at 30th Street and runs 297 km to Cumberland, but the first 5 km through Georgetown past locks 3 and 4 to Fletcher's Cove is flat, shaded and entirely free. National Park land, open dawn to dusk.
Seventy-five near-vertical stone steps between Prospect Street and M Street, built in 1895 for the streetcar line and made famous by the 1973 film's final scene. Officially a DC landmark since 2015. Free, permanently open, popular with local runners.
North America's largest Catholic church, finished in stages from 1920, holds 80-plus chapels sponsored by immigrant communities and one of the world's biggest mosaic collections. Admission and the guided tours are free; open daily from 07:00.
A Dutch gift of 1954 with 53 bells, standing on the ridge beside Arlington Cemetery. The lawn gives the classic head-on view of the Lincoln Memorial, Washington Monument and Capitol lined up across the Potomac — with no ticket, gate or lift queue.