Humor Magazine
On the Stokksnes peninsula in Iceland, you can encounter a strange construction: A circular cluster of turf-roofed buildings which look like an abandoned fortification. There's a giant rock in its center.
On closer inspection you'll see that the rock isn't a rock at all. It's made from styrofoam. And the abandoned fortification has been built for a never-completed movie.
(thanks Juergen)