Explanation:
The Valley of Ashes is a wasteland that lies between West Egg and New York City. It was created by the dumping of waste from the factories in the city, which made it uninhabitable.
The Valley of Ashes is a symbol for the decline of Gatsby’s dream and his inability to obtain Daisy. The Valley of Ashes represents the emptiness that Gatsby feels when he realizes that he will never be able to take Daisy away from Tom.