Best countries to visit in europe (tourist)?

I have been in Turkey for business and soon I will have ~ 1 month to travel around europe for pleasure. I was wondering what people's opinions are on the the best countries to visit in europe? I was thinking Paris, Amsterdam, Vienna, Italy, Budapest, United Kingdom, Switzerland and Czech republic. But I... show more I have been in Turkey for business and soon I will have ~ 1 month to travel around europe for pleasure. I was wondering what people's opinions are on the the best countries to visit in europe?

I was thinking
Paris, Amsterdam, Vienna, Italy, Budapest, United Kingdom, Switzerland and Czech republic. But I don't know if this is too many and I don't know If I'm missing some good ones.

Which europen countries would you visit and what are the major touristic attractions in those countries/cittieS?
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