The largest Viking silver hoard ever found in Britain, and one of the largest anywhere: in 1840 workmen repairing the bank of the River Ribble in Lancashire dug into a lead chest holding some 8,600 pieces of silver, coins and hacksilver, buried around AD 905, perhaps a war-chest for the reconquest of Dublin. The finders were allowed to keep one coin each; the rest went to the Crown. Most is in the British Museum now. The riverbank is still there.
Cuerdale, on the Ribble (Lancashire, England)
See it on the map
Other places on the map within a couple of hours of here.