The altar of Sagrada Familia is oddly familiar to anyone with a nodding acquaintance with the work of Salvador Dali.  For everyone else, the crucifix is so high above the congregation that one's first thought is "I've never seen it from this angle" and it seems... disconcerting.  There's that problem of trying to describe Sagrada Familia with human language.  'Disconcerting' is the wrong word, but there doesn't seem to be another that fits better.