Simon Reeve presents a travel documentary as embarks on a journey along the Tropic of Capricorn, the line of latitude which cuts through Southern Africa, Australia and South America.

The Tropic of Capricorn also runs through South America ... The source (start) of the Amazon River is in the Andes Mountain range in Peru. It flows northwards through Brazil with its mouth ...

where rainforests and dense tree-covered mountains tantalize adventurers. The tropics run between the latitude lines from the Tropic of Capricorn in the Northern Hemisphere to the Tropic of Cancer ...