Originally Posted by
sfvoyage
If I arrive at VIE at 12:25 and my onward flight leaves at 17:15, is that enough time to take the train/subway into town centre for a visit? Mostly interested in walking around the older and scenic parts of town for architecture. Obviously not enough time to visit museums.
To make your visit more efficient, see my article
Vienna: Summer and Winter for a concise look at things you can do during your whirlwind tour.