4. Shake Shack
Should you be able to pull yourself away from those amazing burgers for just a minute, you'll find that Shake Shack boasts a killer hot dog, served split and griddled as nature intended, to match. Go for the the Shack-cago Dog, with relish, onion, tomato, pickle, and mustard.
92 Winthrop St., Harvard Square (617-758-8495).