Both West Egg and East Egg are described somewhat in chapter 1 beginning about 2 or 3 pages from the start of the story and continuing occasionally throughout the chapter. Descriptions continue throughout the entire book though. The area where the Wilson's live, the valley of ashes, is described at the start of chapter 2. It is given a vivid description here. The two "Eggs" are described more through the individuals who live there than they are phsycially described, especially East Egg where the Buchanans live. We get very little physical description of that beyond Daisy's house because very little of the action takes place there and what does occur there, takes place in or near the Buchanan house.