Uploader comment: For generations, Merchant monument in the Cemetery of Marion Ohio has moved on its own. The unpolished base of the massive granite ball, that once rested on the pedestal, has moved for over a century. No one has a positive answer as to why the two and half tonne granite ball is able to move with out the help of any known external forces. There are many theories but no solid answer.
It's pretty big. About 8 feet high or so.