Thanks to Digg, I found an interesting post about the location of Middle-earth - Yes, from Lord of the Rings.

According to the post:

Bird, a professor of Geophysics and Geology at UCLA, has overlapped the map of Middle-earth with one of Europe [...]

The post lists the locations of places from Middle-earth, including The Shire and Mordor.

Definitely an interesting post to read, check it out here.