Alfonso Valderas is León's most famous restaurant for bacalao (salt cod), prepared around 25 different ways. If this is your first encounter with this versatile fish, order it al pil-pil (with a mild chilli sauce) – this preparation is devilishly difficult to get right, but they always do here. Otherwise, you might want to try the pig's trotters filled with cod. Reservations recommended.
Also notable is the grandly elegant dining room, replete with a magnificent grandfather clock and a baffling display cabinet of antique shoes.