From A Wiki of Ice and Fire
The Saffron Straits are the eastern exit of the Jade Sea, dividing Essos and Ulthos. The city of Asshai is on the north side of its western entrance. North of the straits are the Shadow Lands, and Ulthos is to the south. The Saffron Straits widen to the east, and in them is the island of Ulos; then they run off east outside the known world.
- ↑ The Lands of Ice and Fire, The Known World.