What are some of the most famous uses of maps?

This map probably modeled on the West coast of Britain was where the Lord of the Rings saga took place. That Saga took place in a world already invented in the Silmarillion. (http://en.wikipedia.org/wiki/The_Silmarillion). Tolkein was however not just an explorer of space but also time, as he was experimenting with Dunne’s ideas of multi-dimensional time, and each character has a slightly different understanding of time in Lord of the Rings.

http://en.wikipedia.org/wiki/J._W._Dunne

http://en.wikipedia.org/wiki/An_Experiment_with_Time

For more on that see

Time in the Stone of Suleiman
by Verlyn Flieger

The rhetoric of vision: essays on Charles Williams
By Charles Adolph Huttar, Peter J. Schakel p.75
http://books.google.com/books?id=3NBWBoT5mI8C&lpg=PA75&dq=%22ts%20eliot%22%20%22an%20experiment%20with%20time%22&pg=PA75#v=onepage&q=%22ts%20eliot%22%20%22an%20experiment%20with%20time%22&f=false

So Lord of the Rings is also a map of time.
http://xkcd.com/