The Wall of Heaven (known locally as the Qiang Tian) is the dominant mountain range on the continent of Tian Xia, running along practically the entire western coast of that enormous land mass. They begin in the northern realm of Hongal and run all the way down to the naga empire of Nagajor, far to the south and east. They are generally steep and impassible, with few navigable passes, which means that most trade and travel runs parallel to them. The scarce places where travel through the mountains is possible naturally become great centers of trade. The greatest of these is the city of Goka, a cosmopolitan port city on the mountains' western edge.