Rob Bell visits San Francisco's Golden Gate Bridge and meets the people who keep it operational, as well as discovering the fascinating history of a bridge that many claimed was impossible to build.

Sydney Harbour Bridge is the world's tallest and widest steel arched bridge. Connecting the northern suburbs with the city centre, it brought together a city divided not just by water but by cultural differences. Rob Bell explores the story of this engineering masterpiece, whose builders utilised the very latest technologies and techniques of their time.

Rob Bell explores the history and construction of the world's first bridge to be constructed entirely from iron.

Rob Bell looks at two bridges by British architect Lord Norman Foster - the Millau Viaduct in southern France and London's Millennium Bridge.

Rob Bell reveals why the design of the Severn suspension bridge revolutionised bridge-building and the dangers involved in the construction.