El Sobrino de Botín in Madrid, Spain has been in operation since 1725 and holds the Guinness World Record for the oldest restaurant in the world. It serves traditional Castilian cuisine, like el cochinillo (suckling pig), roast leg of lamb, and jamón, among other dishes. Tradition is seeped through the restaurant, from the centuries-old wine cellar now used as a dining room, to the wood-fire oven that has been continuously lit since the beginning of the operation.