River: Tree House Den

Ever wondered what the river in the Tree House den leads to?

(This is nytefaerie's den).

In the Tree House den, there is a river winding through it. Where does it lead? It surely does at a foresty appearance to the scene. Do you think this den was originally constructed in right between the Lost Temple of Zios and Serepia Forest? It has the river of the Lost Temple of Zios, and the forest appearance of Serepia Forest. Does the river wind down to Jamaa Township? 

More Info:

Location: It is a den, so it has to real location. If it were to be located, I would say between the Lost Temple of Zios and Serepia Forest.

Further Location: I don't think it's possible to locate it any further, but I'd say the Tree House den was built beside the Lost Temple of Zios's river. 

 Theory: The river leads down to Jamaa Township. This can't be proven though. It may wind off somewhere into an unknown land that hasn't been opened to Jamaa yet.