I've had that kind of experience myself: I'm looking at a map and I see someplace that makes me think, 'I absolutely have to go to this place, no matter what'. And most of the time, for some reason, the place is far away and hard to get to. I feel this overwhelming desire to know what kind of scenery the place has, or what people are doing there. It's like measles - you can't show other people exactly where the passion comes from. It's curiosity in the purest sense. An inexplicable inspiration.