A visit to the Royal Albert Bridge that spans the River Tamar on the border of Devon and Cornwall. Tim Dunn gets a closer look at the phenomenal structure and finds out how it was constructed. Tim also visits Wolverhampton to learn about the history of its train stations, old and new. And there's a look at Gällivare station in Sweden, high in the Arctic Circle, originally built to serve the huge iron ore mines of the frozen north.

Tim Dunn is in London exploring the striking stations of the Piccadilly Line's northern extension. Tim also takes a look at Causey Arch in County Durham – which is the oldest single span railway arch in the world. And Tim also finds out about Pilsen station in the Czech Republic.