With its palaces, sculpted parks, concert halls and museums, Vienna is a city steeped in culture. Once home to composers including Beethoven, Mozart, and Johann Strauss, and to artists Gustav Klimt, Oskar Kokoschka and Egon Schiele, as well as the father of psychoanalysis, Sigmund Freud, Vienna has been at the forefront of major cultural movements for centuries. But that does n't mean it's stuck in the past; Vienna has a youthful side, too, and is visited yearly by backpackers as much as mainline culture aficionados -- something Richard Linklater celebrated in his 1995 film Before Sunrise, which charted two strangers falling in love in the course of one day, with Vienna as the romantic backdrop. Whether you visit in the winter for Christmas markets glittering under snowflakes, or in the spring when the flowers in the city's many parks are in bloom, the city is sure to charm. CNN World's Treasures selects some of the best spots to experience Old World Vienna, from galleries and parks to historic landmarks. SEE 2012 marks the 150th anniversary of the birth of Austrian painter Gustav Klimt, one of the founding members of the Vienna Secession, an avant-garde artistic group at the turn of the century. Indeed, one of the city's architectural masterpieces, the art nouveau Secession building, was commissioned by the group at as a haven for the latest in contemporary art. The Museum