Barcelona

Barcelona dazzles visitors with its extraordinary architecture, from Antoni Gaudi's surreal Sagrada Familia and Park Guell to the elegant Palau de la Musica Catalana. The city's Gothic Quarter preserves medieval streets alongside world-class museums and a buzzing waterfront, making it one of Europe's most vibrant urban destinations. Must-sees include Las Ramblas, Barceloneta beach, and the modernist Eixample district.