Tolkien states in the prologue to ‘The Lord of the Rings’, it would be fruitless to look for geographical correspondences, as “Those days, the Third Age of Middle-earth, are now long past, and the shape of all lands has been changed…”. Yet Peter Bird, Professor of Geophysics and Geology at UCLA, has attempted just that in this overlapped the map of Middle-earth with one of Europe.
Tolkien didn’t create Middle-earth ex nihilo: ancient Germanic myths divide the Universe in nine worlds, inhabited by elves, dwarves, giants, etc. The world of men is the one in the middle, called Midgard, Middenheim or Middle-earth. That term doesn’t thus describe the entirety of the world Tolkien thought up. The correct term for the total world is Arda – probably derived from German Erde (’Earth’) and only first mentioned posthumously in the Silmarillion (1977); and Eä (for the whole Universe).
Where On Earth Was Middle-earth? [strangemaps]