Palau de la Música Catalana

A concert hall with a stained-glass sun in the ceiling

Hours: Tours usually start between morning and about 15:30 (varies by date; check palaumusica.cat); concerts in the evening
Tickets: Self-guided €20, guided €24 (discounts for students, families and others); combined with Casa Milà €42. Book on palaumusica.cat
Address: Carrer del Palau de la Música 4–6; 10 minutes on foot from Plaça de Catalunya, close to the cathedral

Wedged onto a narrow street corner is a building crammed with mosaic columns and sculpture. Lluís Domènech i Montaner, often described as one of Gaudí's teachers, built it in 1908 for the Orfeó Català choir, and it is the only concert hall on the UNESCO World Heritage list. Inside the auditorium a bell-shaped stained-glass skylight hangs from the ceiling and glows gold and blue in daylight, while half-sculpted muses with instruments burst out of the wall behind the stage. Go in on a tour of about 50 minutes by day, or with a concert ticket at night.