A vintage passenger car below the Golden Spike Observation Tower overlooking Bailey Yards, as of 2022 the world's largest train classification yard, of the Union Pacific Railroad in North Platte in southwest Nebraska. A "classification yard" is a trainyard where freight trains come together so that their freight cars can be resorted for travel to different parts of the nation. North Platte is centrally located, both in Nebraska and in the nation and is ideally suited for this task. Photo by Carol Highsmith, 2021.