I'm not so sure about that. If anyone can give some specific locations I'd be glad to double check. But my understanding is that the specific where has a random element. There's handpicked locations that high level stuff can end up at, but what goes where is designed to vary between different players so that it's always a mystery.
I am not sure about skyrim, but in morrowind there were pieces of high level gear specifically placed all over the world. Things like a complete glass armor set, the daedric masks and many other items, you just had to learn where they were.