Cazorla's dramatic Castle of the Ivy, a 700m walk above Plaza de Santa María, has great views and is home to the interesting Museum of the Upper Guadalquivir, whose diverse collections include traditional agricultural tools and kitchen utensils, religious art, models of an old olive mill, and a small chapel featuring a life-size Romanesque-Byzantine crucifixion sculpture.
The castle is of Muslim origin, comprehensively rebuilt in the 14th century after the Reconquista.