Prairie Schooners - History of Conestoga wagons and labeled diagram, from the University of Oregon.
Thinkquest: Conestoga Wagon - Provides an interactive diagram of a Conestoga wagon with explanations of its various parts and their uses. Also includes a quiz to test what you have learned.
Wikipedia: Conestoga Wagon - Examines the Conestoga Wagon, a heavy, broad-wheeled covered freight carrier used extensively during the United States' Westward Expansion in the late 1700s and 1800s.