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Katy Watson celebrates the centennial of the opening of the Panama Canal, an engineering marvel that permanently changed world trade. She finds that the waterway - once run by the United States - is now a force for unity and pride in Panama.

China’s remarkable economic growth in recent years means millions of people are now wealthy enough to travel abroad – and most of them go on organised itineraries. Michael Bristow joins one such group in London on the first leg of a whistle-stop tour of Europe. He learns that you can indeed tour the UK in two days flat and see Rome in just four hours. Just don't disgust the natives by spitting, advises China's tourism board.

Presented by Owen Bennett Jones
Produced by Laura Gray

Picture: Tourists look at a cargo ship at Miraflores Locks in the Panama Canal. (RODRIGO ARANGUA/AFP/Getty Images)