Aurora or bust.

I'm obsessed with the Northern Lights. I've read the scientific explanation a few thousand times, but it makes zero sense to me and frankly, I don't really care. It's pretty. The lights are most visible between October and April; for the best chance of viewing, shack up as close to the Arctic Circle as possible. And since the lights aren't exactly reliable, may I suggest Iceland? At least you won't be bored and freezing if Aurora Borealis goes on break.