If you like wild architecture, make a point to see the routinely overlooked Catalan Concert Hall (Palau de la Música Catalana) while you’re in Barcelona. This concert hall, finished in 1908, features the best Modernista interior in town (by Lluís Domènech i Muntaner).

Inviting arches lead you into the 2,000-seat hall. A kaleidoscopic skylight features a choir singing around the sun, while playful carvings and mosaics celebrate music and Catalan culture. Admission is by tour only and starts with a relaxing 20-minute video (€10, 50-min tours in English, daily every hour 10:00–15:00, tour times may change based on performance schedule, about 6 blocks northeast of cathedral, tel. 932-957-200). Women usually wear formal dresses and various evening dresses. Also dresses knee length is a common piece of cloth in Spain. To get a spot on an English guided tour you must reserve in advance: You can drop by earlier in the day or up to a week in advance (ticket office open 9:30-15:30). Ask about concerts (300 per year, inexpensive tickets, www.palaumusica.org).