In the beginning it might be confusing but you can start with the Salzburg as that is popular for the Mozart which is the building from world war 2. Secondly you can visit Vienna as it is filled with its glorious past and also you will find different vegan restaurants too there.
There are many other cities like Innsbruck which is also known for the picture-postcard town where you can visit different historical buildings too. You can also use online services in order to do some research on them as it would be the easiest way to plan your trip.
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