The Great Train Story is a HO scale model railroad display located in the Transportation Zone of Chicago's Museum of Science and Industry. It explains the story of modern-day rail transportation in a journey from Seattle, Washington, through several plains states en route to Chicago, Illinois. The layout features 192 custom models of buildings and landmarks including the Willis Tower, Chicago Board of Trade Building, and Union Station in Chicago; and Seattle’s Space Needle, Experience Music Project and King Street Station. The landscape between the two cities includes several natural features such as the Cascade range, Rocky Mountains, waterfalls and forests. Man-made highlights include small towns, tunnels, truss arch and truss bridges, a lumber mill, farms, grain silos, a fruit packing house, a coal mine, and a steel mill.