The yalkut says that they were exiled to three places, the sambatyon, a place further away then the sambatyon and another place, I don’t remember where.
I once heard a speech a long time ago from a person who was trying to track down the shevatim. He said that they triangulated a certain place somewhere in yehupitzville (I don’t remember where) and he tried getting there three times, but each time he had to stop for some crazy reason like his house burning down.