Steam railways are train systems that use steam engines to power locomotives. These engines burn coal or wood to heat water in a boiler, creating steam that drives pistons and turns the wheels. Steam railways were crucial in the 19th and early 20th centuries, revolutionizing transportation and trade. As technology advanced, steam railways gradually gave way to diesel and electric trains, which are more efficient and require less maintenance. However, many steam railways still operate today as heritage or tourist attractions, allowing people to experience the charm of vintage trains and the history of rail travel.