Imperial Vienna: palaces, galleries and coffee houses built for sitting still in. Vineyards on the hills above, and trams that make all of it easy.
Free things to do
Free
Stephansdom and the Innere Stadt
Walking into the nave costs nothing; the catacombs, the lift and the south tower's 343 steps are the ticketed extras. It's a working cathedral, so Mass closes the aisles.
Free
Naschmarkt grazing lap
Start at the Kettenbrückengasse end, eat inward.
Free
Coffeehouse afternoon at Sperl or Hawelka
One melange, one slice, one newspaper on a stick, for hours. Nobody will rush you. That's the institution.