There are plenty of great U.S. locales where you can trade in the sound of car horns and sirens for quiet tranquility – and beat the pump, to boot. Explore these charming isles and mountain towns from a street-level perspective that no car ride can rival, plus throw in a kowtow to Mother Nature, as all of these sprees are carbon emissions-free. Where to go on a vacation where you don't need a car? See below for our favorite car-free destinations in the U.S.