An early Herzog film called Fata Morgana - bascially just an extended series of typical Herzog images with music over the top and some readings from the Popol Vuh spoken in German. Apparently it tells the story of the birth and fall of earth as seen from the viewpoint of an alien race....anyway, it was exellent with some unforgettable/moving images and very fitting music.
For those of you with Lovefilm, they've got a fair few of the harder to find Herzogs (Only Dwarves Start Small, Stozek etc) tucked away, but for some reason they're not listed un his name - you'll have to search by title.