My girlfriend and I were able to secure really good deals on flights and hotels for a trip to Munich and Vienna this winter. We will be in Munich for four days and Vienna for four days. It is all free cancellation, and we do not pay hotels until we arrive.
With that aside, we were thinking about taking a day trip from Vienna one of the days. I know that Bratislava is close, but have read that It might not be the best option.
I am looking for advice on where to take a day trip from Vienna, or if I should do 5th day in Munich for an extra day trip (Salzburg, Nuremberg, etc.).