On the other hand, October is a nice time in Greece if you stick with your original plan. |
Maybe Amsterdam and Copenhagen. My 19 year old son went to Copenhagen last summer and loved it. Amsterdam is great, too. |
We did a Budapest, Vienna, Prague trip a few years ago and loved it. They are good sized cities but not overwhelming like Rome, Paris and London. We took trains between the cities and that was very easy and nice. |
Buenos Aires |
I personally would do Dublin and Belfast. Easy train between the two and the flight time is manageable from Chicago.
My second pick would be Copenhagen then train to Stockholm. My teens really loved both those cities. Longer flight though. |