Maybe next time you are here - it is impossible to see it all during a short trip. Schönbrunn, for example, would take a day to properly explore (Access with the U4 Metro). The Belvedere is also a great place to visit - in fact, when you start from the top at the S-Bahn Station Quartier Belvedere and walk through the park, you eventually wind up close to downtown via Schwarzenbergplatz and the Karlskirche. A second trip, starting at the same place, but walking down through the Botanical Garden which is next to the Belvedere, would also be a great discovery trip. So many more places, like across the Danube you find the UNO City and the Danube Tower. A summary of some of my Vienna Photos over many years you will find here: [Vienna on Flickr]. (https://www.flickr.com/photos/artofthemystic/albums/72157613278942660/) - on the individual photos you will find also what other albums they had been placed in. Though I lived here for almost 14 years, I have yet to discover more. And much has changed since the time I grew up in Vienna.