8Sagrada Família, Spain

The Basílica de la Sagrada Família in Barcelona is a testament to the genius of architect Antoni Gaudí. This unique cathedral, still under construction since 1882, combines Gothic and Art Nouveau forms in a way that evokes a sense of organic fluidity. Its intricate facades, representing the Nativity, Passion, and Glory, are covered with detailed sculptures, while the interior, filled with natural light through colorful stained glass, creates an ethereal atmosphere.