10Barcelona, Spain

Known for its distinctive Catalan architecture, Barcelona is a feast for the eyes.

The works of Antoni Gaudí, including the Sagrada Família, Casa Batlló, and Park Güell, showcase the city’s unique blend of Art Nouveau, Gothic, and Modernisme styles. Gaudí’s imaginative designs, characterized by colorful tiles, undulating forms, and organic motifs, make Barcelona a must-visit for architecture aficionados.