Amazing Stuff is full of amazing videos and pictures. Here is just one of the amazing things on the site below.
1 minute 54 seconds
Geological phenomenon where rocks move in long tracks along a smooth valley floor without human or animal intervention.
Bob Sharp and Dwight Carey started a monitoring program in May 1972. Thirty stones in all with fresh tracks were labeled and stakes were used to mark their locations.
Personally I think it has something to do with the Earth's gravitational pull or some kind of magnetic reaction. Either way it is still a mystery...