Fodor's Expert Review Louis' Lunch

This family-owned luncheonette, opened since 1895, is recognized as the birthplace of the "hamburger sandwich." Its first-rate burgers are cooked to order in an old-fashioned cast-iron grill (that dates back to 1898) and served with a slice of cheese, tomato, and onion (the only accepted garnishes) on two pieces of white toast. Add potato salad or chips and a slice of pie, and you're all set!