You may spot Crypts of Segorbe Cathedral from a distance before you actually find this amazing religious building. Look around inside if the doors are open or just admire the facade from the street.
Located in Segorbe, this principal church is worth a look. But you'll find loads more to discover in the area. Museo del Aceite Seborbe, Segorbe Cathedral, and Pico Del Águila aren't too far from Crypts of Segorbe Cathedral.