Definitely not England juding by what you’re looking for. I went on a road trip last year in May going through like half of Europe and I can safely say that you MUST go to Italy or Spain. Yes, Greece has beautiful water and that but it does not have as good of an atmosphere as Spain and Italy do. If you choose Spain, go to Barcelona; pretty sure it was rated #1 city in Europe and it sure as fuck is the cleanest place you will ever go in your life. If you choose Italy, Venice is something you must see. I’ve went through Venice, Verona (City where the story of romeo & juliet took place, you can go see juliets balcony and take a picture with her monument while holding her breast for good luck ez) Milano, and Bolzano. Any of these locations will fit your criteria.