Thanks a lot to Caroline for these useful tips on Vienna!
What to see:
*the three castels (Belvedere, Schönbrunn and Hofburg). Schönbrunn is not to be missed (by the way, this is what tourists visit when they only spend one day in Vienna): If you are fans of Princess Sisi, you must visit Schönbrunn and Hofburg, though the Sisi Museum is in Hofburg, in the royal apartments. In Hofburg you can also find the National Horse Riding School and the National Library.
If you love Klimt, don’t miss Belvedere.
At the entrance you are usually provided with an audio guide (except for Belvedere).
Gardens must be wonderful in springtime and summer. When I went, there was one meter of snow, so I cannot tell you much.
What to do:
*in Schönbrunn you can see evening shows of classical music, opera and ballet. One and a half spectacular hour that is really worth the while, even because it all happens in the orangery of Schönbrunn, where the movie on Mozart was shot.
* For me the Hundertwasserhaus, very different from the rest of the city, is a must
* The Danube River (if you can, go on the Danube Island, it is nicer and it has a tube station).
* The Prater: an amusement park with the famous old ferry wheel (cabins look like wagons), from where you can enjoy the view of the whole city. Moreover at the entrance there is a Museum of the park that tells its history. In front of the ferry wheel you find Vienna’s Madame Tussauds.
* This is not necessarily pointed out in tourist guides, but if you love classic music you should not miss the cemetery (Zentralfriedhof) where all the greatest composers are buried. You find them all in the same parcel (I believe nr. 36)
* There is also a Museums area, with temporary exhibitions.
Tips and Tricks:
The tube is expensive and honestly you can do much more on foot, especially when it does not snow.
The main shopping street is Mariahilferstrasse, very close to the Museums area. It’s there we booked our hotel, Hotel Kummer, a 4 stars for less than 100 € per night, including breakfast. You can eat in a lot of nice places, or you can order kebabs, pasta, pizza to take away or eat on the spot.
Don’t miss at least some old pastry shop.
If you like meat, try the Schnitzel, breaded steack. In winter there are many typical dishes with potatos, very nice.