Dothraki Sea

From A Wiki of Ice and Fire

The Dothraki Sea is a vast grassland on the eastern continent. It borders the Free Cities of Pentos and Qohor to the west, the Red Wastes to the east, and Lhazar to the south. The grass grows so thick and tall in the Sea that it rolls like waves in the breeze. The plains are largely empty, populated only by the Dothraki, a nomadic and equestrian culture. It has only one city, an ancient ruin called Vaes Dothrak.