New Orleans vs Washington DC

New Orleans moves to its own rhythm, and three days is enough to feel it. Start in the French Quarter, where wrought-iron balconies hang over Royal Street, street musicians play outside St. Louis Cathedral on Jackson Square, and a plate of powdered-sugar beignets at Café Du Monde is a rite of passage. By night, skip the Bourbon Street crowds and head to Frenchmen Street in the Marigny, where small clubs host brass bands, trad jazz and funk for little or no cover. Ride the green St. Charles streetcar under live oaks to the Garden District, a neighborhood of antebellum mansions and shady sidewalks, then browse Magazine Street. Save an evening for a long Creole or Cajun dinner of gumbo, shrimp and grits, crawfish etouffee or redfish, and a morning for the French Market. With more time, spend a full day at the National WWII Museum, glide through cypress swamps on a boat tour, visit Whitney Plantation for an honest look at the lives of enslaved people, and explore the murals of the Bywater and the oaks of City Park. Come in spring or fall for the best weather, and pace yourself: in this city, lingering over lunch is the plan.

Washington DC may be the best family city in America, mostly because so much of it is free. In three days with kids you can stand under real spacecraft at the National Air and Space Museum, meet the Hope Diamond and towering dinosaur skeletons at the National Museum of Natural History, and see the original Star-Spangled Banner at the National Museum of American History, all without paying admission. Some sites use free timed-entry passes, so reserve them before you go. Between museums, let kids run on the grassy National Mall, ride the carousel and picnic with food-truck lunches. Save an evening for the monuments at sunset, when the Lincoln Memorial glows, the Reflecting Pool mirrors the Washington Monument and the crowds thin out. The Metro makes getting around easy, and younger children ride free with a paying adult. With more time, see giant pandas, elephants and great apes at the free National Zoo, tour the US Capitol and the stunning Library of Congress, crack codes at the International Spy Museum, and day-trip to George Washington's Mount Vernon and the brick sidewalks of Old Town Alexandria. Spring and fall are ideal, with cherry blossoms in late March to early April.