Savannah and Charleston vs Washington DC

Two of the South's most beautiful old cities sit just two hours apart, making them an easy pairing for a four- or five-day trip. Start in Savannah, Georgia, where 22 leafy squares shaded by Spanish moss-draped oaks break up a historic district made for wandering. Stroll to the white fountain in Forsyth Park, tour a historic house that tells the full story of the enslaved people who lived there, and end the day on cobblestoned River Street watching container ships glide past. Then drive about 110 miles up the coast to Charleston, South Carolina. Walk past the pastel facades of Rainbow Row and the grand homes on the Battery, cool off at the Pineapple Fountain in Waterfront Park, and dig into lowcountry seafood: shrimp and grits, she-crab soup and fresh oysters. Plantation tours such as Magnolia, Boone Hall and McLeod Plantation are part of any visit, and the best of them center the histories of enslaved people and the Gullah Geechee culture they built. With extra days, add Sullivan's Island, the beaches of Tybee Island and Kiawah, and the quiet waterfront town of Beaufort. Spring and fall bring mild weather, blooming azaleas and comfortable walking.

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.