In The Great Gatsby, what is the area where George and Myrtle Wilson live known as?

George and Myrtle Wilson live in an area referred to as the Valley of Ashes. The Valley of Ashes is introduced and described in the opening of chapter two. If East Egg is old money and high class, and West Egg is new money, the Valley of Ashes is industrial and blue collar. 

This is a valley of ashes — a fantastic farm where ashes grow like wheat into ridges and hills and grotesque gardens; where ashes take the forms of houses and chimneys and rising smoke and, finally, with a transcendent effort, of men who move dimly and already crumbling through the powdery air. 

In the Valley of Ashes, everything is covered in a gray haze, including the people. The exception to this is a billboard for a now long-departed eye doctor, Dr. T. J. Eckleburg. 

The eyes of Doctor T. J. Eckleburg are blue and gigantic — their irises are one yard high. They look out of no face, but, instead, from a pair of enormous yellow spectacles which pass over a nonexistent nose. 

The Valley of Ashes is significant because it provides a setting for various scenes in the novel without the distraction of the East Egg/West Egg class distinctions. The Great Gatsby is rife with symbolism, and the scenes that occur in the Valley of Ashes seem to defy class and wealth; an unhappy marriage, an affair, and a death all happen there. 

George and Myrtle must live in the Valley of Ashes, as opposed to East Egg or West Egg, because they, like Nick, don't fit the mold of the others. They are neither new money nor old, and they are neither fully corrupt nor fully moral.