La Sagrada Familia, Barcelona
La Sagrada Familia church, which is Spanish architect Antoni Gaudi's unfinished tour de force, rises above Barcelona like something out of a Dr. Seuss book.
Construction on this UNESCO World Heritage Site began in 1882, and though progress slowed after Gaudi's death in 1926, it continues today. The projected year of completion is 2026, exactly a century after Gaudi's death (though some estimate it will be finished closer to 2040).
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