This is the area of Thassa, the Gorean ocean, that lies about one hundred pasangs west of the islands of Cos and Tyros. There are only a few small islands located west of Cos and Tyros. No one has ever sailed past that region and returned to tell of it. There are many legends as to what might lie in that region. Some claim that Thassa is endless. Others claim that you will eventually reach the edge of the world and could plunge over that edge, falling for days through emptiness. Still others claim that there are clashing rocks and sea monsters (like the Greek Scylla and Charybidis). Some even say there are magnetic mountains that can pull the very nails out of a ship. The smashed planking of some ships have been found floating in the waters west of Cos and Tyros but usually so little is found that the actual ship cannot be identified.

Others said, in stories reminiscent of Earth, and which had doubtless there had their origin, that the world’s end was protected by clashing rocks and monsters, and by mountains that could pull the nails from ships. Others said, similarly, that the end of the world was sheer, and that a ship might there plunge over the edge, to fall tumbling for days through emptiness until fierce winds broke it apart and the wreckage was lifted up to the bottom of the sea. In the maelstroms south and west of Tyros shattered planking was sometimes found. It was said that some of this was from ships which had sought the world’s end.
Beasts of Gor- 28