Palau de la Música Catalana, built between 1905 and 1908 by Lluís Domènech i Montaner, is a Catalan Art Nouveau jewel. A UNESCO World Heritage Site, the concert hall - unique in having natural light enter through a central skylight - has been hosting world premieres since forever. At intermission, generations of music lovers have met up in Lluís Millet Hall, a two-story space with stained glass windows. Tickets for performances can be acquired at the box office, online or by telephone. Daily tours every 15 minutes from 10 a.m. - 3:30 p.m., until 6 p.m. between Easter and July and from 9 a.m. to 8 p.m. in August.