Bill's Bar & Burger—Rockefeller Center

"I have seen the burger of my dreams and it can be found at Bill's," declares Josh Ozersky, food blogger and author of The Hamburger: A History. But it's not just the Bill's Classic (toasted sesame bun with lettuce, tomato and pickles on the side) or the Fat Cat (double-stack with cheese on an English muffin) or the Bobcat (with Mexican green chilies and jack cheese) that have critics and amateur burger addicts alike fawning, it's the American vibe and cuisine, like thick shakes and chili cheese dogs, too.  Looking for something different? Try Bill's Blackened Fish Sandwich with mustard aioli.