Some countries actually put sheep on their currency. Iceland, of course.
(click for big)
That's Mount Hekla, an active volcano, in the background.
This is the annual autumn roundup, the rettir, when all the sheep that have been grazing, lambing, and living wild in the highlands since spring are gathered together and driven in their thousands down to their home farms in the lowlands for the winter.
If you ever have the opportunity to go to Iceland, be sure to coordinate it with this amazing event.