La Sagrada Familia, Barcelona's iconic, unfinished basilica, is Antoni GaudÃ's breathtaking masterpiece, blending Gothic & Art Nouveau with nature-inspired forms, built by donations since 1882, expected to finish in 2026, symbolizing faith through its tree-like columns, vibrant stained glass, and symbolic facades (Nativity, Passion, Glory). It's a UNESCO site, a Minor Basilica, and Barcelona's most famous landmark, offering an enchanting forest-like interior and a truly unique spiritual experience.