Western Civilization I: Paradiso/Purgatorio

Below is a map of the Land of Eden that I created for my Western Civ class.  I wanted to show them visually what Genesis has to say about the land and the Garden, but could not find a satisfactory map online.  Most were either too cryptic to follow or blatant attempts to match the text of Genesis with modern landmarks (this despite a global flood that included water spouts exploding from under the earth).  Most assumed that the Tigris and Euphrates were the same as those rivers of the same names today, never mind that there's a Lebanon, Missouri; a Paris, Arkansas; and New York, and despite the fact that the modern rivers do not match the geographical description of the one river forking into four rivers as it leaves the Garden (one map even tried to make the Nile one of these rivers, even though its headwaters are Lake Victoria in the middle of Africa).  So I decided to take matters into my own hands.

This is totally hypothetical, of course, but I strove to meet the criteria listed in the Genesis text.  We know that the land of Eden was distinct from the Garden, which God planted in the east of the Land itself.  A river flowed either from or through the Garden (I've opted for the former) and that it split into four rivers, the Pishon and Gihon seeming to encircle or otherwise encompass the lands of Havilah and Cush, respectively.  The Hiddekel, meanwhile, flowed towards Ashshur, while the Parah (or Euphrates, depending on the translation) is only mentioned.  To the east also is Nod, which I've walled off with mountains in an effort to emphasize the restless exile imposed upon Cain.  I've given Havilah a mountain range because the land was rich in gold and minerals.

The Garden I've walled off with mountains to emphasize its isolation following the Fall, while also adhering to the dictates of gravity; if the river did indeed flow from the Garden, then it would be elevated land with a narrow exit from which the river might flow, and which is guarded by the flaming sword and cherubim.