Another of the modernista landmarks, this one was designed by Domenech i Montaner and built around the beginning of the 20th century. It's now a UNESCO World Heritage Site, as well as a focal point for the city's classical music scene. Although it's impressive from the outside, try to take a tour or see a performance at the hall so you can get a look at the magnificent stained-glass ceiling and other interior design elements. Guided 50-minute tours are offered daily 10 am-3:30 pm (till 7 pm July-September) with the English-language version leaving every 30 minutes 10 am-3 pm. In August, the Palau remains open until 6 pm. Tour admission is 10 euros adults. Buy tickets at the box office or the Muses del Palau shop daily 9:30 am-3 pm (no advance reservations). Sant Francesc de Paula 2, Barri Gotic, Barcelona. Phone 93-295-7200. http://www.palaumusica.org.