La Seu (Palma Cathedral)

La Seu stands where you see it from the water, right on the harbor wall, and in the evening it reflects in the Parc de la Mar below. Gaudí briefly worked on it (he did the canopy and some fixtures before returning to Barcelona), and Miquel Barceló created a chapel with a ceramic wall that looks like an underwater landscape. The light spectacle through the great rose window happens twice a year, around February 2nd and November 11th, when the sun falls exactly through the rose window onto the opposite wall. Otherwise mornings are best (fewer people, better light), 10 euros entry, half an hour is enough.