There is one that I know of - the Hunzanitas ( Pakastan, Himalayas )...  
Unfortunately, I don't actually possess any of the research material ( if 
anyone does, I would love to see it! ).

Jason
  ----- Original Message ----- 
  From: Jdownmaine 
  To: [email protected] 
  Sent: Tuesday, November 06, 2001 4:58 PM
  Subject: RE: CS>hi list


  It is very puzzling to me that we can fearlessly drink tap water with loads 
of chlorine, flouride, iron, copper, and other metals and minerals we know 
nothing about and haven't measured, but a little silver worries us! Are there 
documented places in the world with high silver levels and longevity?   
  Judy Down Maine