Visit just about any Midwestern city and you'll find at least one 19th-century German restaurant still operating and thriving. German cuisine may currently be the most out-of-fashion food in the country, but we find it hard to resist a visit to these great old dining halls. The Rathskeller is Indy's oldest restaurant (open since 1894), and can be found in a building originally known as Das Deutsche Haus, a German social club.