Here are 5 things I would see in Vienna. As you see in my 5 things I mostly included art, history and nature because I love Vienna's diversity. But that doesn't mean that you should follow exactly as I wrote it. Everybody has a different taste and I would appreciate your comment on what would you see in Vienna :)

1.
Image source: Larkie @ Large

See the historic center of Vienna

2.

Image source: Zoo Vienna

Vienna's Zoo: it's told to be one of the most beautiful zoo's

3.

Schoenbrunn Palace: to feel the history of Habsburg rulers and its beautiful surroundings :)

4.

Image source: Austia-Forum

Albertina Museum: if you love art that is the place to go :)

5.

Image source: Wikipedia

Volksgarten: as the name says it's people's garden and there you can feel the heart of Vienna