Well, this is a very open-ended question as it depends on your budget and what time of year you're wanting to visit.
The southern region of Spain, Andalusia, is very culturally & historically interesting and has many beaches and resorts.
Tuscany is also fascinating to visit and has some awesome places to relax.
Greece has many island getaways, including Santorini.
Then there's the big cities like London, Paris, Berlin, Munich, Vienna, Prague, Rome, Amsterdam which offer lots of opportunity for sightseeing, shopping and self-indulgence. about 6 years ago
I could also recommend some other places, not like the most usual but also very attractive spots indeed in my experience. Such as Budapest, Hamburg, Southern France, Pirineos, Cote d`Azur, Sicily, Sardegna, Menorca, Edimburgh, Dublin. It all depends on each one`s taste and personal interests during a trip. about 6 years ago
The question is a little vague!!
I would recommend Venice but only out of season; Istanbul in May or October; Paris in the spring is gorgeous; Spain but before June or after August.
The UK is great and the timings really dont matter because it will probably rain no matter when you come! Of course, Edinburgh shoud be avoided during the Festival and London is best done out of summer as the tubes get unbearable hot and horrible.
I think Galway is a fab city and would combine that with a night or two in Dublin or Cork. Chester is great for history, St Ives in the winter is wonderful, Cambridge is nice and you can then do London as well. about 6 years ago