There are two maps left uncovered by previous articles:
Pangaea
Named after a predecessor of modern continents – a huge land mass that was drifting along Earth big ocean millions of years ago before breaking into smaller continents – this option will generate a map with single continent, surrounded by sea. With land mass defined, you can still control the shoreline – it can be either natural, pressed ,or solid.
Terra
As the name suggests, the option will generate an "Earth-like" map with continents shapes resembling those of our planet. All the civilization start in the Old World – so discovering America has much importance here, as the land is rich with resources.