If you're not already familiar with Western Russia's Ponoi River (also spelled Ponoy), you should be. The Ponoi is the antithesis of virtually every other Atlantic Salmon river you've heard of. The Ponoi doesn't produce tales of fly fishing for Atlantic Salmon that you're used to, with fishermen in Eastern Canada or the British Isles heading off to the river for a week, casting a billion times, and landing a single fish or counting the success of the trip in tugs. Days on the Ponoi are often measured in dozens of fish caught.
The Ponoi is a pristine river, free of commercial fishing or significant human influence, which flows through the Kola peninsula, eventually dumping into the White Sea almost 800 miles north of Moscow. Getting there isn't easy, and it isn't cheap, but it provides most that visit it a sure-fire bet at the fishing trip of a lifetime.