4/4 Sue finishes her journey at the home of the Mekong's source - China.
4/6 Michael Portillo finds out about the birth of Britain's long alliance with the Portuguese.
3/6 Michael journeys deep into Europe to explore a country where east meets west: Poland.
2/6 The Bikers discover why Bangkok is the street food capital of the world.
1/2 Dan Snow sets off on a historical adventure down the Grand Canyon, 1869 style.
1/6 In Hong Kong the Bikers discover the secrets of wok chi at a street food stall.
44/52 Series showcasing the best of travel across the globe.
3/4 Sue reaches Laos, one of the poorest and least developed of the Mekong nations.
2/6 Michael Portillo takes the train down the spine of Italy from Rome to Sicily.
1/6 Michael Portillo sets off with his 1913 guide to to journey through Russia.