OJ Brat: Landmarks can sometimes be hard to in Vienna. Everywhere you look, you'll witness incredible architecture. However, this majestic roman-gothic masterpiece is absolutely unmistakable. A must visit.
J Kofler: Very interesting conglomerate of buildings with lots to see and explore. Take your time; don't overdo it! Check the exhibition you want to see most, but also enjoy the historic atmosphere with coffee.
Chelsea Moore: Make a reservation to avoid 15 minute queue. The liqueur in the coffee is alcoholic. That was a nice surprise. Apfelstrudel pastry is a bit soggy, highly recommend the Cafe Central Kaffee.