The brand new third series explores more innovative architectural and technological designs that changed the world. Including the world's first transcontinental communications system that was dubbed the "engineering triumph of its age" with an impact compared to the advent of the internet.

From the legacy of civilizations over 8,000 years old to the birth of world-famous train lines, this series uses a combination of engaging social history, recent archaeological findings, and pop-science to uncover the secrets of the greatest construction achievements in Irish history. Discover the technological innovations behind Ireland’s architectural heritage, and the global legacy of the people who built them.