Linz, Austria's third largest city, runs along the banks of the River Danube. With a 17th-century Old Town and a beautiful New Cathedral, they are proud to be a future-oriented city, mixing antiquity with innovation. Its culture is deep-rooted in their famous Linzer torte, known to be the oldest cake in the world. Trying a slice is immersing in their traditions, as the recipe dates back to 1653. Find the best one at K & K Hofbäckerei. For the best city views, visit the 539-meter mountain Pöstlingberg. Aside from the walking street, find design and vintage items down the street of Landstrasse.