Who wouldn’t trade an ugly elevated highway for a ribbon of new parkland? Boston’s famous Big Dig dismantled the eyesore John F. Kennedy Expressway that long separated downtown from its waterfront and turned most of its former route into a linear park named in honor of JFK’s mother. The Rose Fitzgerald Kennedy Greenway snakes for a mile and a half from Chinatown to the North End, mostly parallel to Boston Harbor. It’s a pleasant alternative to walking the city’s busy streets to get around, and you can use the park’s free Wi-Fi to plan your visit. Along the way you’ll find seven decorative and interactive fountains; a carousel where lobsters, codfish, harbor seals, and other local animals take the place of horses; and a variety of food trucks for when you need to recharge with a taco, a grilled-cheese sandwich, or a cupcake. The Greenway’s visitor center for the Boston Harbor Islands National Recreation Area has information and ferry tickets.