The search of the lost Incan city of Marpa takes the team ever deeper into the Cotahuasi Canyon. Their final challenge is a dizzying 2500m descent straight down the canyon wall. Show more
Discover 11,128,835 listings and 279,593 playable programmes from the BBC
The search of the lost Incan city of Marpa takes the team ever deeper into the Cotahuasi Canyon. Their final challenge is a dizzying 2500m descent straight down the canyon wall. Show more