It makes ZERO sense. That part of Skyrim receives the least precipitation of all regions, and is something of a dry tundra/northern steppe. The hill itself is rather puny, so it doesn't serve as a locus for rainwater or snow collection the way the Throat of the World does.
Where is all that water coming from?????
Something else:
The Skyforge.
There are multiple odd things about the place. Think about it - a forge that does to metal what no normal forge can do - even more powerful than the lunar forge. And it was there a Looooooooooooooong time ago - Joorvaskr was built next to the skyforge because of its discovery. Hence, it clearly predates the nords. Furthermore, the Nords don't have a clue why it's there - which means that the snow elves never told them. Yet the nords and snow elves coexisted for some time before the outbreak of genocidal war, which means they must have been on speaking terms. And the only way they COULDN'T have told them is...........if even THEY didn't know how it came to be there.
To me, the conclusion is inevitable.
There HAS to be SOMETHING underneath the city. Something which serves as a reservoir for water, under pressure. And a source of heat or energy as well for the skyforge.
It's either some incredibly powerful artifact along the lines of the Heart of Lorkhan, or it's something Dwemer. That's my guess.
Anyone got any other ideas?




Cannot... not be a banfoy...Must...rationalize...everything !