Thorgrim gives a lovely detailed account on MP, we have found a couple of puddingstones at cross lanes but mostly its used in churches ..
Another place of interest is Great Canfield church, with Odin carved on one pillar with his two ravens, and the Great World Serpent on the other pillar. Its weird that a Northern pagan god confronts you in the porch of a christian church, often wondered if our folklore giants don't stem from the Northern giant Ymir....

Well remembered oci :-)

Moss writes about Great Canfield church on her blog by the way - http://northstoke.blogspot.com/2009/05/great-canfield-church.html and as both Avebury and Essex have been mentioned here, this bit especially may be of interest -

"Right hand pillar of the tymphaneum with Odin and serpents? It has the 'dot' all down the serpent back, as seen on the Avebury font serpents. The tails are fanned out similar to a fish tail. 'The legend goes that the world serpent with his tail in his mouth was doomed to lie in the ocean encircling the world till the Ragnarok. Should the tail ever be pulled out of the jaws, universal calamity would follow.' Brian Branston - The Lost Gods of England."