The Cheesewring!  Cornwall, U.K.

This is a granite rock formation that was formed naturally by weathering.

The legend of its formation is, somewhat sadly, more popular than the actual geologic history.  Local legend says that the rocks were formed as the result of a contest between a man and a giant.  The giants who lived at the top of the mountain were mad that Christianity had been recently introduced, so they challenged a Christian saint to a rock throwing contest.  They each threw a rock that stacked perfectly on top of the last one until the Saint failed-- but an angel carried his stone to the top.