Vienna gave birth to some of the world's most beloved musicians and artists, Mozart and Klimt among them, but the city isn't resting on its cultural laurels. Art exhibits and cultural performances continue to break boundaries; take, for example, the 2013 Leopold Museum exhibit, Nude Men, where even the onlookers themselves were without clothing. Street musicians have been known to bring concert pianos to the street to play to passersby. Vienna is a virtual open-air museum, where the stunning architecture is nonetheless dwarfed by the spectacular art within. Of course, if your tastes tend toward the classical, a performance at State Opera is not to be missed.