To me, maps are very symbolic. They tell you where you are and how to get to new places. They show you where you've been and how you got to where you are now. If you look at an older map, it will remind you that things change: borders, names of countries, even geography.
So of course, I love the idea of incorporating maps into a room. I used to get my ex-boyfriend an antique framed map for his bedroom every year-- always of a country he had been to or of a place that had a special meaning. I always thought they were great gifts... they have character (especially antiques), they're cool to look at and can have a sentimental value. Now I have to start my own collection!
As you can see in these examples from a Hallmark magazine, you can get two completely different looks with two different maps. A more colorful and bright approach:
Or a more sophisticated and rich approach... (by the way, LOVE the trunks as a coffee table and the dog!)