But take a look at where in Skyrim is Darkwater Crossing:
http://images.wikia.com/elderscrolls/images/7/72/Darkwater_Crossing_Map.jpg
As you can see, it's smack dab in the middle of Eastmarch. Not exactly in the middle as Throat of The World, but is still quite far from the closest "border", which is the mountains to the east that borders with Morrowind
It is not even the closest area to the said mountains: there is Shor's Stone, which is closer, and is still quite far from Darkwater Crossing
Darkwater Crossing is also awfully far from Cyrodiil, Hammerfell, and High Rock
At this point, it's certain that "Darkwater Crossing" is by no means near any border. When the character arrives at Darkwater Crossing, s/he had already crossed the border. Especially if s/he's a Breton/Redguard coming from High Rock/Hammerfell
The only way to justify Darkwater Crossing as a border is if you count the character as coming from Morrowind. Pehaps to see first hand of Vvardenfell
So, what gives?

