MMOSite.com posted an interview with Fallen Earth Lead Game Designer Lee Hammock:

MMOSITE.COM: Can you give us some description about the game world? The game seems requires high-performance PC. What kind of graphic will the game bring to us?

LEE: The game world is an 83 km by 83 km area of the Grand Canyon, giving us almost seven thousand square kilometers of territory. We have numerous terrain types within this area, from forests to deserts. We have a real day/night and seasonal cycle so players will have extremely immersive world to play in.

The game world is divided up in sectors, each of which has 20-30 towns in it along with levels, encounter areas, and other points of interest. Each town has its own storylines, which tie together between multiple towns, and between sectors. Towns vary from old, beat up hovels that are little more than shacks built out of scrap metal to large fortified settlements.