Once upon a time, in the mid-1800s, a huge project began in America—the construction of the Transcontinental Railroad. This gigantic railroad connected the East and West coasts, making travel across the country faster and easier than ever before. It was a phenomenal feat, taking six long years to complete! The construction was a race between two big companies, the Union Pacific and Central Pacific. Starting from different ends of the country, they laid down tracks across plains, deserts, and mountains, finally meeting at Promontory Point in Utah. However, this enormous task wasn't done alone. Many workers, particularly immigrants from China and Ireland, worked tirelessly to build this marvel. They faced harsh weather, tough terrains, and long hours but never gave up. Today, their hard work is remembered as a critical part of America's growth and unity.