My good friend from back home in the States came to visit me recently. She had never been to Europe before and wanted to basically do all that she could when visiting me in the UK. So I crammed in as much as I could with her by doing London and Paris in basically just 2 days. A lot of days were spent traveling to them of course.
If this is something you'd been wanting to do or would be interested in, here is that trip. Enjoy!