Are human beings born to travel? The latest series of Race Across the World has just reached a thrilling climax. Its popularity is a measure of our obsession with wandering.
Modern-day pilgrimage is ratings smash hit
Triumphant: Alfie and Owen, a football referee and a trainee pilot from Hertfordshire, were this year's winners. Glossary
Indonesian - The country consists of over 17,000 islands in the Pacific and Indian Oceans.
Antidote - A cure for something. It originally meant a medicine against poison.
Nomadic - People who move around and do not live in one place are nomadic.
Mecca - Islam's holiest city and the birthplace of the prophet Muhammad. Only Muslims are allowed into the city, and millions make pilgrimages there.