Tag: Karlskirche Central Europe Road Trip 1/6: Vienna & Budapest – Karlskirche, Fisherman's Bastion, Road VignettesPart 1 of our late-May 2025 Central Europe road trip: Karlskirche, St. Stephen's Cathedral and cake in Vienna, then Hungary, the Danube and Buda Castle Hill with Fisherman's Bastion and the Magdalene Tower. Includes tips on electronic road tolls for a three-country drive.