National Geographic : 1951 Jun
731 Air Force Color Photo Titan of the Midwest; World's Busiest Rail Center; Largest Meat and Grain Market Chicago, home of 3,606,000 people, is relatively young. It was incorporated in 1833 with 550 inhabitants. Fort Dearborn, built 30 years earlier, gave the town its start. Chicago River (right) is the entrance to the Illinois Waterway, which links Lake Michigan to the Mississippi. Once the Chicago emptied into the lake, but engineers reversed the flow. Wrigley Building (right) exposes a gleaming white face. A breakwater (lower right) protects the yacht basin. A wider view to the right would show the Gold Coast, an exclusive apartment section.