Conde Duque

This 18th-century military barracks turned modern art museum, the Conde Duque has two galleries with permanent exhibitions, open-air patios for large sculptures and a rotating schedule of shows featuring up-and-coming artists working in all media. During the summer, the pretty courtyard hosts concerts and is a fantastic place to catch a hot jazz act or a stately string quartet. Ask your hotel concierge to send you a schedule of performances before you arrive.