the Temple Expiatori de la Sagrada Família, which is a masterpiece by Catalan architect Antoni Gaudí. It’s one of Barcelona's top tourist attractions even though it is not completed yet. Its construction has started in 1882 and it does not look like it will be finished any time soon.
As you can see from the photos posted below it is very unique in its design. Not sure if I would call it pretty or esthetically pleasing, though. But I do appreciate the fantasy and open-mindedness of its architect.
The main entrance to the temple:
Inside the church:
Views from the top:
Stairs leading down:
Beautiful decorations on the side of the temple:
