My pick
My tip“The ticket covers the tower and museum; closed Monday–Wednesday; the tour with the tourist office is more useful.”
A collegiate church with a tall octagonal Mudéjar tower, listed in World Heritage as part of “Mudéjar Architecture of Aragon”, built on the site of the Great Mosque of Calatayud.
Easy to reach
Trains from Madrid and Zaragoza; the church is in the center. The tower is climbed by a narrow staircase. Full services.
Address
Plaza Santa María 5, Calatayud