这张在1869年堪萨斯州托贝卡市的鸟瞰图，可以让你对堪萨斯平原有一点概念

出处: Ruger, A. "Bird's eye view of the city of Topeka, the capital of Kansas 1869. Drawn by A. Ruger." Chicago Lithographing Co., 1869. Map Collections: 1544-1999, Library of Congress.