Beneath busy city streets, there's a hidden world alive with motion, sound, and stories. This book takes kids on an exciting journey underground, where trains race through dark tunnels, stations shine with art and music, and history comes alive with every stop.

From the earliest steam-powered trains to today's high-speed, high-tech systems, readers will discover how subways were built, why they became so important, and how they transformed the cities above them. They'll learn about dazzling chandeliers hanging in Moscow stations, the clockwork timing of Tokyo trains, and the deep tunnels carved under London and New York. Along the way, they'll uncover fascinating tales—like how stations became shelters during wartime, or how musicians and performers turned platforms into stages.

This isn't just about trains—it's about people, cities, and ideas. Subways tell the story of invention, teamwork, and the ways humans connect with each other. By the last page, young readers will see that every ride underground is a chance to explore history, science, and the future all at once.