Bubbling with an electrical energy and warmed by the Mediterranean sun, Barcelona is unsurprisingly one of Europe’s liveliest destinations. It has a world-famous soccer team and some tremendous tapas, but it’s really the incredible history of artistic innovation that draws the crowds. A unique language and culture—plus a bit of a chip on the shoulder—helped Barcelona develop a peerless style that’s intricately woven into its architecture. Every big city in Spain seems to have its own iconic…