20 Fun Facts About Famous Subways

Beneath the streets of cities around the world, subway systems keep millions of people moving every day. This guide gathers twenty surprising facts about famous subways from London's historic Underground to Tokyo's massive network showcasing the engineering marvels and quirky history behind each line. Readers discover how these underground railways were built, the challenges engineers faced, and the ways subways have shaped urban life. Written for middle-grade readers, the accessible format brings worldwide subway facts to life without heavy jargon.