A classic Reuben sandwich is made of corned beef, sauerkraut, Swiss cheese, and Russian dressing served on buttered rye bread. There are some variations, and the amount and quality of ingredients varies from place to place. Some restaurants, delis, and sandwich shops rise above the rest and gain a reputation for top-notch Reubens. Here are a few of them from across the country, in a list I compiled for mental_floss. It is not definitive, nor is it ranked, but all of these places have won accolades for their Reuben sandwiches.