SMOKE & STEEL - SECRETS OF THE MODERN WORLD

Examining a cliff in North Yorkshire that offered the public a new ride experience. Plus, the world's oldest operating roller-coaster, an astronomical observatory in California and a mining hoist in Germany.

Examining 'The Warrior', an ironclad warship on the south coast of England. Plus, a grand public works facility in Prague and the mint building in San Francisco.

The industrial legacy of a tunnel under the Thames, how steam engines reshaped the Netherlands, and a surprising link to our digital world.

A mill on the outskirts of Manchester was part of a dawning revolution in the way we work - the factory. A bridge in St. Louis, USA pioneered the use of steel - a construction material that would reshape our world. And a vast hangar in Brazil built to house the airships transformed passenger travel in the 20th century, but those giants of the sky owed a debt to an earlier age.

Examining the legacy of a cable hut in Cornwall, how a mountain railway in New Hampshire inspired its passengers and a lighthouse in France.

Examining the legacy of the first iron framed building (a mill in Shrewsbury), how paper production changed the world, and the impact of the Trans-Siberian Railway.