For those not familiar with European culture or European history, Thule was a place described by classical scholars as a place very far to the North of ancient Rome and the Greek city-states. Thule is often considered synonymous with the land of Hyperborea.
Thule/Hyperborea is described as an idyllic land inhabited by exceedingly tall, fair skinned humans who are known to "paint themselves blue".
Accounts of where, exactly, Thule is located vary greatly. Sources place Thule variously in Scandinavia, Iceland, Orkney, Shetland, islands in and around the Baltic Sea, Russia, Gaul, the Ural Mountains, and Britain.
Though, I would caution readers against trying to pinpoint any physical location for Thule. The reality is, it is best to look at Thule as a
spiritual place - the spiritual home of those with European heritage.
It truly seems as though the spiritual power of Thule exerted a huge influence on humans as they entered the European continent during their migrations from Africa and the Levant. For example, the earliest forms of art were created in Europe nearly 50,000 years ago. And it is from these beginnings, so long ago, that European culture developed into the dominant culture on this planet.
That statement is not meant to belittle the cultures of others, but is merely a statement objective fact. European art, architecture, fashion, music, language, morals, values, ethics, and even etiquette underlay all of modern civilization in every corner of the globe.
The power that Thule exerts on the peoples of European heritage is truly something to be proud of - something to celebrate and embrace.
http://en.wikipedia.org/wiki/Thule
http://en.wikipedia.org/wiki/Hyperborea
http://en.wikipedia.org/wiki/Prehistoric_art#Middle_Paleolithic
Asatru and Odinism are neo-pagan faiths that do their best to adhere/emulate the pre-Christian, Germanic faiths of Western Europe.