The Mile Long Moving Sidewalk of the 1893 Chicago World’s Fair In 1893, visitors arriving at the World’s Columbian Exposition by steamer stepped off onto a long pier stretching into Lake Michigan. Instead of walking the half-mile to the White City, they paid a nickel and boarded the Great Wharf Moving Sidewalk — the first public moving walkway ever built. Period engineering accounts said the platforms could seat about 4,300 people and, when riders also stood, carry roughly 6,000 at once. Hourly throughput estimates ranged from about 32,000 to 40,000 people. Guinness World Records lists it as both the first and the longest moving walkway of its era. How it worked It was not a conveyor belt in the modern airport sense. Architect Joseph Lyman Silsbee and engineer Max E. Schmidt built a continuous loop of overlapping wooden platforms, each about twelve feet long, riding on ordinary railway trucks and wheels. Passengers stepped from a stationary platform onto a slow-moving section (about 2–3 mph), then onto a faster inner section (about 4–6 mph) lined with benches. You could sit the whole way, stand, or walk against the motion. The loop ran out the pier and back under a long shed that kept riders out of rain and sun. The ride was popular because it was cheap, continuous, and gave a breeze off the lake. By the close of the Exposition it had carried nearly a million people. The sidewalk sat beside the Peristyle, Casino, and Music Hall — the gleaming classical colonnade that framed the Court of Honor. After the Exposition closed, fire in January 1894 destroyed the Peristyle and damaged part of the pier. The sidewalk itself was later dismantled. The one major exception still standing is the Palace of Fine Arts, rebuilt in limestone and now the Museum of Science and Industry. The sidewalk was real engineering, It was also a prototype that never realized to city streets, which is why it still feels like a glimpse of a future that did not arrive. A larger, elevated version appeared at the 1900 Paris Exposition (the trottoir roulant). Airport moving walkways arrived decades later. Urban planners kept drawing multi-speed sidewalks for New York and other cities well into the twentieth century. None of those city-scale systems were built. The 1893 machine remains the most ambitious public version ever operated in the United States. The sidewalk was not erased from history. It was dismantled after the fair, photographed while it ran, and then mostly forgotten.