Lake Merr

Lake Merr is located to the north and west of Wall. This expansive body of water is both uncharacteristically calm for a lake high in the mountains, and unfathomly deep. A thriving community once existed here, it's people prosperous from the bounty Merr provided, and protected by the surrounding mountains. The people of Lake Merr were envied by all the surrounding tribes. They built great temples with golden statues and market places full of the riches of the world.
All that remains now are the cold ruins of a lost people.
Long ago, it is said, Ul-Merr, great god of the sea fell in love with a simple daughter of a fisherman. She lived in a small hut on shores of the vast Western Ocean. Ul-Merr tried to woo her riches from the sea, treasure from shipwrecks, pearls and other secrets of the sea if she would love him. She spurned his advancements for she knew, like the sea, Ul-Merr was fickle god, and would leave her once he had his prize.
It was only when he promised that the offspring of their union would be a great and powerful being, that she relented.
Sure enough, Ul-Merr soon became tired of her and moved on to another conquest, and the girl gave birth to beautiful son. But, though handsome on the outside, the girl could tell something dark and powerful dwelled inside the child. She fled her village and ran east, deep into the wilderness, finally to rest high in the mountains by a lake.
There, the boy grew. His mother tried her best to raise a normal child, there, alone in the wilderness. But, the boy was powerful, vain and ill tempered, like his father. When a wandering tribe settled on the far bank of the lake, the girl, now an aging woman, tried to relocate to avoid contact with the world and her godlike son. He would have none of it, and in a fit of rage killed his mother.
Thus, the people of Lake Merr would come to know Him. He would make them into a great city, and in return they would worship him, sacrifice to him, and in the end, pay the terrible price.