Yakutia, Eastern Siberia in general.
Southern Siberia
have you head of lykov family? They are known for spending 42 years in complete isolation from human society in an otherwise uninhabited upland
http://en.wikipedia.org/wiki/Lykov_famil...
Mountains and rivers, swamps and lakes. And the most deep frost on Earth.
a lot of russia is unpopulated, especially siberia and far east
