Vienna

It's not a little village, but you can get to Bratislava in an hour by train from Vienna.

You might get more answers if you post in the Austria forum
Assuming you mean Vienna not Venice

https://community.ricksteves.com/travel-forum/austria

I would recommend dinner and a concert at Schonbrunn Palace. I would recommend the small Third Man Museum based on the Orson Welles movie for WWII history and post war Vienna. Go to Hotel Sacher for a slice of Sacher torte a chocolate cake to die for. Go to the Imperial Treasury Museum and look for the Spear of Destiny. Ride the Ferris Wheel at Prater Park. Eat Kaiser Marren and schnitzel at Gasthaus Nestroy. Take a tour of Saint Stephan Cathedral.

Visit the Sigmund Freud Museum where he worked and lived before fleeing from the Nazis.

Take the train to Melk to see the abbey and the town. A very nice day trip. Plenty of places to enjoy lunch.

There's a nice tour of the opera house.

I love Vienna and have visited often, so I highly recommend five nights.

It's a beautiful city. Easy to walk around and there is always public transportation.

We were surprised at how much we loved Vienna. If you are there on a Sunday, the music at the service at the Augustiner Church is wonderful.

Good afternoon, recently my husband and I were in Vienna, a very beautiful city, good museums, I recommend going to the opera house and trying the local cuisine. Despite the fact that the city is not very big, there is something to see here, so I think 5 days is not much. If you are planning to fly soon, then business class flights to Vienna is doing very good discounts on air tickets now.

The Imperial Furniture Museum. Gorgeous stuff and never crowded.

The Opera House! Take a guided tour if you are not interested in attending or no production while you are visiting.

As others have stated, go to the Austria forum. Take anything/everything recommended by Emily as gospel.

I agree that the opera house is stunning. We did standing room for a performance of Hansel and Gretel. (See the RS guide for info on doing this) I think the tickets were a couple euro a piece! We left at admission. It was perfect for us.

I also would recommend the Naschmarkt. If you like wine, a day trip of sorts would be to a Heurigen. The trolley goes out to one of the areas. There also was walking paths in the area we went to. It might have been called the Vienna Woods??

Try and stay flexible. I suspect that you will have a great time with 5 nights in Vienna, many do.

But occasionally even the most popular location in he world does not speak to you and you could begin to wonder how you can stand 2 more nights.

So build a Plan B. I am always happy when I do.

lynne has an excellent idea, but I would spend the night; Sopron is another good idea and either give you a new cultural experience.

Of course I am biting my tongue and not saying 3 nights in Vienna and 2 in Budapest ...... September / October is the best time to be there.....

Bratislava I am not as thrilled about.

Are you a wine drinker? Most of Austria's top wine growing regions are within an hour of Vienna and very easily accessible. I'd suggest perhaps staying 3 days in Vienna and then a night or two in another village. Many wine estates have restaurants and accommodation available, both along the Danube (best for white wines) and in Burgenland (red wine dominated region).

My family visited Vienna in 2011, and we hope to return as a couple. The town is small, by big-city standards. One favorite activity was spending an evening in the heurigern, the wine taverns on the outskirts. The emperor granted a tax-free concession for wine sales some hundreds of years ago, and the wine, mostly Gruner veltliner, is inexpensive. The taverns also serve food. You can sit outside on a warm summer night and sip wine. The busses service the district, so you don't need to drive.

If you do visit a heuriger just remember, the wine is very strong alcohol wise! It goes down easy, but whew, it catches you up pretty easily too.