Europe? The EU now encompasses 25 countries.
If you could give more specific information to work with, we could give you some ideas.
For an Amercan.....I would advise avoiding the UK. Your US dollars are worth next to nothing against the UK pound sterling--and it's really not a very exciting destination. Mind the gap. The UK is outrageously expensive and the bang for your buck is minimal. Much like America but unbelievably expensive. Cold, and dank and full of......muslims. Meh.
I've been in a number of European countries and the UK sits at the botom of my places to visit.
The top? Greece. I-love-Greece.
I love Greece!! Been there twice this year.
Went to the UK for Christmas last year and will never go back again. Yeah, minding the gap and staying out of your country....
But going back to Greece every chance I get!
I want to buy property there. Greece just rocks. England does not.