Final answer:
There is no specific geographical feature mentioned as being created during the battle between Humbaba and Gilgamesh and Enkidu in the Epic of Gilgamesh; the story alludes to the broader Mesopotamian landscape where such mythic battles were set.
Step-by-step explanation:
The geographical feature that was created during the battle between Humbaba and Gilgamesh and Enkidu is not explicitly described in the surviving text of the Epic of Gilgamesh.
However, considering the geographical context of the Epic, which is set in the region of Mesopotamia, between the Tigris and Euphrates rivers, and the mention of forests in Humbaba's realm, it can be inferred that dramatic changes in landscape may have been part of the legendary narrative, symbolically representing the impact of human actions on the environment or the consequences of the heroes' quest and battles.
In historical terms, Mesopotamia experienced significant geographical changes due to human activity, such as the creation of irrigation systems or the building of city walls for defense purposes, indicative of the increased violence in the second millennium BCE.