"It might be the Palace of Catalan Music, but you come as much for your eyes as your ears. Outside, hefty stone pillars draped in floral mosaics hint that something special lies within—that, and the small matter of a UNESCO World Heritage classification. Still, the auditorium will surprise you: a kaleidoscope of roses, chandeliers, and stained glass, it’s like 50 brides threw their wedding bouquets and they all exploded in the sky. For once, we don’t have Barcelona poster boy Gaudí to thank. This is the work of Modernist architect Lluís Domènech i Montaner, a building some say is even prettier than the mosaic master’s La Sagrada Família. Built to house the Orfeó Català symphonic choir, today’s musical acts span from choral to pianists, jazz, flamenco, and operas such as La Traviata and Carmen. Ticket prices vary with notoriety, from around €18 ($22) to a bank-note-hitting €175 ($215) for a headline act. A key decision is whether to visit in daylight, for a tour, when the building is at its most spectacular, or at night, for a concert, when the music is." - Gemma Askham