What should I avoid in Washington DC?

The single biggest mistake first-timers make in Washington DC is trying to walk the entire National Mall in one day. The Mall stretches about 3 km from the Capitol steps to the Lincoln Memorial, and by the time you've crossed from the National Museum of Natural History to the Washington Monument, your feet will be raw and your energy gone. Between June and September, humidity sits around 70-80%, and the air feels like warm, wet cloth pressed against your skin. The Mall's central lawn offers almost no shade, and the Smithsonian cafeterias nearby serve $14 prepackaged sandwiches that taste like they were made on Tuesday. The food trucks along Madison Drive NW might seem like a better bet, but you'll pay $12-15 for mediocre tacos while standing in direct sun. Walk north 10 minutes to Penn Quarter instead. Daikaya on 6th Street NW serves pork-bone ramen for $16, and the difference is clear on the first spoonful.

Pedicabs are Washington DC's quietest tourist tax. They cluster near the National Air and Space Museum and the Lincoln Memorial, and operators will quote $60-80 for a 15-minute ride along the same route you could walk in 25 minutes. If you take one, agree on a price before you sit down. Several visitors have reported being charged per person rather than per ride, which turns a $40 quote into $120 for a family of three. At Reagan National Airport, ignore any driver in the arrivals hall offering a flat fare to your hotel. The metered ride to downtown runs $15-22. Better still, take the Metro Yellow Line from the airport station, which connects to Terminal 2 by a covered walkway. The ride to Metro Center takes about 15 minutes for under $3. Uber and Lyft run $18-30 to central neighborhoods depending on the time of day, still cheaper than the flat-fare pitch.

Washington DC's summer humidity is not a minor inconvenience. July and August temperatures routinely reach 35°C with a heat index above 40°C, and the thick, damp air carries a faint metallic tang off the pavement. If your trip falls in these months, schedule outdoor monuments before 9am or after 5pm. The Smithsonian museums are free and air-conditioned, so use them as your midday refuge. Cherry blossom season is the other timing trap. The Tidal Basin path becomes nearly impassable during peak bloom in late March to early April, with foot traffic backed up along the narrow walkway toward the Jefferson Memorial. Hotel rates across central Washington DC rise 40-60% during the National Cherry Blossom Festival, which runs roughly March 20 to April 13 each year. If you have flexibility, visit the second week of April. The late blooms still hang over the water, and the crowds thin after the parade on Pennsylvania Avenue.

Georgetown on a Saturday night is louder and more alcohol-soaked than most visitors expect. M Street NW between Wisconsin Avenue and 33rd Street turns into a bar crawl by 11pm, with groups spilling off the sidewalk. If you're staying in Georgetown with children, request a room facing the C&O Canal side, not M Street. The Georgetown Cupcake line stretches 30-45 minutes on weekends for a $4 cupcake that is fine but not worth standing in August heat for. A 5-minute walk to Baked & Wired on Thomas Jefferson Street NW gets you a larger cupcake with almost no wait. Skip Madame Tussauds on F Street NW entirely. At $25 entry, it offers nothing you wouldn't get from standing outside the White House fence at 1600 Pennsylvania Avenue. That view is free, and the building has been there since 1800. The International Spy Museum charges $28.95 and tends to underwhelm adults, though kids under 12 seem to find it more engaging.