This river is approximately 6,450 km long which makes it the second longest in the world. The oldest stones in the Amazon are 570 million to 4 billion years old. In the Amazon there are as many plants and animals as you can imagine. There are animals which you can not find elsewhere. Possibly there are many animals, trees and plants in the area which have not been discovered yet. The landscape of the Amazon is mostly on the same level of height. The difference between the highest and the lowest point is only 110 meters.