A rare tour of Antoni Gaudí's unfinished masterpiece, the Sagrada Familia, unveils numerous little-known details beyond its famous architecture. Highlights include a "magic square" on the Passion Façade, a stone labyrinth, and an all-seeing eye on the Nativity Façade, all imbued with deep symbolic meaning. The tour also provides access to areas rarely seen by the public, such as rooms with sacred relics, historic liturgical garments, and Gaudí's tomb in the crypt, offering a profound insight into the basilica's enduring legacy.