I really like playing around with maps: here are a few examples:

  Find out where cannibals are (or were) in the world
  The areas where gnomes live in Europe!
  Sign my guestmap
  Users' photos from Hokkaidō, Japan.
  See what it would be like if the world was justified
  Discover the almost unknown state of San Serriffe
  Pictures from the area near Wellington, New Zealand