You needn't have a strong religious faith to enjoy the peaceful atmosphere of Palencia Cathedral. Inquire when the next mass starts or when it's open for general viewing.
Situated in Palencia, this principal church is well worth including on your itinerary. But you'll find a great deal more to discover in the area. Isla 2 Aguas Golf Course, Escultura a los Comuneros, and Museum of Palencia aren't too far from Palencia Cathedral.