This WHS is a little bit weird to "review" as are many of the dispersed-location sites that highlight "examples of" a certain style of something. (Whether that be something natural or man-made.) Like many of the reviewers here, I experienced this WHS (in March 2025) at its sites in the city of Zaragoza. I did not go to Teruel at all.

The trip to Zaragoza was a delightful one, which can easily be done in a day or less to see the Aljafería, the excellent four Roman ruins museums, and the famed column inside "El Pilar" Cathedral. To focus more specifically on the WHS itself, I'd say the Mudejar Architecture is a great introduction to learning about the history of Muslim rule in Spain for those who are unitiated. (A period from the 700s ~ 1400s in which Muslims controlled the majority of the peninsula and then fought to maintain control in the face of Catholic kings who pushed to take the territory back.) While the WHS inscribed locations of the Mudejar Architecture are in the North, you could in theory plan a nice themed trip of Spain tracking the Muslim rule beginning in the South at World Heritage sites like Córdoba, Medina Azahara, and Sevilla, and then work your way up North to sites containing this Mudejar architecture. Such a trip would allow you to watch the historical progression and see how the Christian kings incorporated the Muslim motifs and structures from the land they conquered into their own kingdoms.

Worth seeing and learning about, the Aragonian Mudejar Architecture is not the most amazing WHS ever but it is far from a waste of your time.