Real Life Mysteries: What do you think?: The Stones of Carnac and other Megaliths

The mystery: Why are these stones lined up like that?

http://www.windows.ucar.edu/tour/link=/the_universe/uts/carnac.html

The stones of Carnac aren't the only amazing and mysterious stones.  Check here for more information and links:
http://www.windows.ucar.edu/tour/link=/the_universe/uts/megalith.html