I have put together an Immense sized Earth map; is is 200 squares by 120 squares. It is a very large map, coming in at 24,000 squares and will require a relatively beefy machine to play late into the game.
In the world I put 18 civilizations placed relatively close to their real world locations. Some room for creative license and for the sheer size of the world may create some unusual terrain or odd resources. Although I did not spend hours on it, I think I have made a generally fun map that recreates our planet well.
I have included the following civilizations into the map: Churchill, Kamehameha (Hawaiian), Hitler, Mussolini, Pol Pot, Cardenas, David (Israel), Adriaen van der Donck (Netherlands), Dom Pedro, Logan, Yagan, Zara Yaqob, Cleopatra, Shapur II, Pericles, Ho Chi Minh, Kublah Khan, and Peter (Russia).
Have fun!