7. Find "A Thing" To Visit
Chances are if you're in Europe, you're going to visit more than one city. In order to give this whirlwind trip a scavenger-hunt-like feel, choose one "thing" that you have to check out in each city. For me, it's libraries. I look up their most impressive, opulent library and then walk around with my jaw hanging open for an hour. I once met a girl that liked to find ancient cavemen art, and one guy that had to eat the dessert that city was known for. It's a fun way to experience a town and make it memorable.

Image: Marlen Komar