down here on the Chesapeake, we have some oysters. most of what i consider the better ones come from small areas and are sold by place of final growth.
lynnhavens and chincoteagues come to mind. quite surprisingly, the oyster from the lower potomac river is a great oyster. not real salty, not readily available, but a very fine specimen.
oysters in the maritime Provence in france are pretty amazing. must be 100 varieties. each claiming to be the finest.
this guy has a lot of oyster info"
http://www.oysterguide.com/maps
and here
http://www.oysterguide.com/book/what...-eater-are-you