I will be traveling to Vienna in early October. We plan to stay in Vienna for the first 5 nights but will have 3 additional nights to go somewhere before returning to Vienna the night before we fly home. Can anyone suggest the best "add on" destination(s)" which would be in reasonable proximity to Vienna? Since our 5 days in Vienna will be more urban, I am thinking about smaller cities or rural areas. Right now, I am leaning toward traveling toward Salzburg and perhaps staying there or going to Halstatt for a night or two. But we have also considered going to Budapest or Prague, but I think going to an additional city might be sort of "more of the same" after being in Vienna for 5 days. We are especially interested in scenery and enjoy good food. Since we will be there in early October, I am hoping we can see some good fall foliage. We will very likely be traveling by train as that is something we don't get the chance to do at home, but it's possible we could rent a car. Can anyone suggest some good 2-3 day destinations accessible from Vienna?