I found this one to be kinda interesting. . .

Even though Tolkien says that the geography at the time of the LOTR trilogy is different then the current geography of the world, some comparisons can be made. . .Take a look at a few of these from

http://strangemaps.wordpress.com/2007/06/03/121
-where-on-earth-was-middle-earth/

• The Shire is in the South-West of England, which
further north is also home to the Old Forest (Yorkshire?), the Barrow
Downs (north of England), the city of Bree (at or near
Newcastle-upon-Tyne) and Amon Sul (Scottish Highlands).
• The Grey Havens are situated in Ireland.
Helm’s Deep is near the Franco-German-Swiss border tripoint, close to the city of Basel.
• The mountain chain of Ered Nimrais is the Alps.
• Gondor corresponds with the northern Italian plains, extended towards the unsubmerged Adriatic Sea.
•The Sea of Rhûn corresponds to the Black Sea.

And a few more that you have to actually read the blog to find out about.