The amazon is 6,400km from the source to the Atlantic, Ed Stafford embarked on a great expedition crossing South America west to east following the river.
He did this for two reasons
1 being raising money and awareness for charity
2 being to leave his mark like the great explorers had many years ago.
Ed Stafford proved by doing this that there are still big voyages of exploration out there, you just need the imagination and will power!