The morose, monumental cathedral and its attached museum glitter with the gold that attests to the great wealth the Camino has bestowed on otherwise backwater towns. An audioguide to the cathedral and its treasures is €1. Guided tours, including a nighttime tour, are also available.
The cathedral’s most eccentric feature is the white rooster and hen that forage in a glass-fronted cage opposite the entrance to the crypt (look up!). Their presence celebrates a long-standing legend, the Miracle of the Rooster, which tells of a young man who was unfairly executed only to recover miraculously, while the broiled cock and hen on the plate of his judge suddenly leapt up and chickened off, fully fledged.
