On drupal.org:
fago
Drupal evangelist since 2005, Drupal Core contributor & contrib maintainer, TU-Vienna graduate (Information & Knowledge Management)
While the Drupalcon webseite has a good few pointers to the well-known major tourist attractions, as locals we'd like to share our knowledge about some of our favourite places with you! So here a few recommendations:
Viennese Wine and Heurige
If you stay for the weekend after the Con, you can join the Vienna Wine Hiking day, which I can highly recommend. There are 3 possible easy hikes through the vineyards with lots of options to stop for tasting gorgeous wine directly from the producers. Furthermore you may enjoy great views of the city even if the wheather is not that great!
If you stay long enough, don't miss it! You can find details and options at https://www.wien.info/en/shopping-wining-dining/wine/wine-trail
If you cannot join the wine hiking day, be sure to visit some Viennese "Heurige" (wine taverns). Good options would be the Schreiberhaus or a little bit closer to the city-center Sissy-Huber.
Otto Wagner Buildings
The famous Viennese Jugendstil architect Otto Wagner (and friends) has left lots of traces back in the city. Apart from some of the subway stations (you won't be able to miss them) we'd recommend looking at the following buildings at least from the outside:
Cafés & Restaurants
Kaffee Alt Wien: An interesting mixture between a traditional Vienese Cafe and a "Beisl" (pub). The food can be recommended too, simple but authentice Viennese dishes, like Gulasch, Schnitzel and a variety of sausages. Although the Kaffee Alt Wien is mentioned in travel guides, it has not lost its athmosphere and is visited by tourists and locals alike.
Flatchers: Great steaks for a reasonable price. There are two restaurants in the same street: A French bistro with georgous French athmosphere and a larger one in American style.
Brunnenmarkt: A local market in one of the lesser known districts, lots of immigrants of south-eastern Europe and Turkey run market booths and Cafés around a nice plaza. You'll find great athmosphere and good food options: Kent, Cafe Ando, Cay Cafe am Yppenplatz
Barfly's: A cuban style cocktail bar with authentic athmosphere and music!
