Barcelona is a living museum of Antoni Gaudí’s whimsical and organic architectural creations. The masterpiece is undoubtedly the Sagrada Família, a cathedral under construction for over 140 years. Its forest-like pillars and dazzling stained glass windows create an otherworldly atmosphere. Next, visit Park Güell to stroll among colorful mosaic monuments and enjoy gorgeous panoramic views of the city stretching to the Mediterranean Sea.