I'll just add that I've done rushed 1-2 week trips through europe and much prefer to spend 3-5 days in 3 places instead. It takes half a day to arrive, settle in, get the lay of the land, and explore, then 1-2 more to actually start "getting" a city. Plus travel costs and constant new lodgings increases costs, chances of losing things, and overall emotional drain. Honestly paris takes 3-5 days as does Barcelona. Plenty to see in both. I suggest Paris, french countryside (Bordeaux?), and Barcelona for a start. then maybe Cote azure like Marseille or Monaco, or nice, cannes... then if you want either head further south to Milan, or Modena/Bologne etc, or further north maybe past Geneva then to Lyon, etc. London, is, well damn expensive, but there's a lot to see there. For 2 weeks, the best trip might be London, Paris, Barcelona with 5 days each less travel time. Each unique with lots to do. taht way you get city, countryside, beach consider looking up the 1-2 week itineraries for trips done by guys like Contiki, Top Deck, etc just to see where they go and how long they stay in each place. Should give you ideas about what's worht it/not. use hostelworld or hostelbookers. Also consider couch surfing... especially where rent is high like london.