http://imgur.com/A08Py2c
Look, I can make up any number of continents I want, rather than use the Greek system for Europe/Asia/Africa. There are plenty of geographical borders to use. Asia surely shouldn't be one huge continent with the ludicrous mountain range in the middle of it.
I've divided North America up into 4 regions. Appalachia is in green, bordered by the Appalachian mountains and defined by the tributaries that lead into the Atlantic. The Great Plains are in orange, surrounded by mountains to the East and West and defined by tributaries that lead into the Gulf of Mexico. Pacifica is in pink, defined by the Rocky Mountains and everything that doesn't fall into another continent. Columbia is in grey, defined by the Panama Canal, Rio Grande, and named after Columbus who thought they were the spice islands.
South America is divided into 2 regions. The West is Andes, defined by the prominent Andes mountains. The East is Amazonia, which gets grouped together for being everything on the other side of the Andes.
Europe is divided into 3.5 regions. The Northwest is Atlantis, bordered by the Alps, the Pyrenees, the Rhine (since it empties into the Atlantic), and the mountains of Scandinavia. In blue is Baltica, named for all of the tributaries in this flat plain that empty into the Baltic and keep this region connected. In orange is Scythia, grouped together mostly for being territory that empties into the Black Sea, bordered by the Ural mountains and the rough terrain of Anatolia. The purple area, Gloria (named after the glory of the Roman Empire), is bordered by mountains and deserts on all sides, and is grouped together due to the interconnectivity the Mediterranean provided.
Africa is split into 4.5. North Africa is part of Gloria. West Africa, bordered by the Sahara and Congo jungle, is in yellow and is aptly called Sahara. The green is the area encompassed by the jungle, named Kongo. The grey covers all the savanna and area that connects to the Indian Ocean, called the Great Savanna. The pink covers all the area that isn't covered by the rest, known as Zululand.
Asia is split into 5.5. In yellow is Mesopotamia, bordered by desert on the West, mountains to the North, and river valleys to the East. The blue area is India, obviously bordered by the Himalayas. The Steppelands are the purple area. East Asia is in white, and is called the Orient. Southeast Asia, in red, is defined by its wet hot jungles, is named Polasia.
And then of course we have Australia and Polynesia.