Michael Portillo braves the awesome power and drenching spray of Niagara Falls in the Maid of the Mist to share what artists, daredevils and millions of tourists have billed as one of the most spectacular experiences on the planet.

Continuing his American journey heading west through New York State, Michael has a lightbulb moment in Schenectady, when he discovers how Thomas Edison's General Electric Company also leads the way in modern rail technology. In Utica, he investigates lock 20 of 57 along the early 19th-century Erie Canal, 325 miles of waterway which connected the Great Lakes with the Atlantic Coast via the Hudson River.

A yellow brick road beckons Michael to Chittenango, where a Kansas farm girl introduces him to a lion and a tin man. On a hillside near Palmyra, Michael finds out about farm boy Joseph Smith and his Book of Mormon, from one of the 15 million believers who follow his religion today.

Further west in Rochester, Michael discovers a famous 19th-century name still trading today - George Eastman, who launched mass market photography with his Eastman Kodak company. Reaching Buffalo, he lunches on the city's famous Buffalo wings and discovers it was once the centre of the world's grain trade. Touring Silo City, Michael learns about the invention which propelled the port of Buffalo into its dominant position, the grain elevator, and how the railroads sealed the deal.