6. Amazon Rainforest, South America
The Amazon is perhaps the most famous forest on earth, and it certainly earns the distinction. Spectacular animal life, incredible plants, and the world’s longest river makes this forest one of the most important, and, indeed, unparalleled ecosystems in the world. How unparalleled? Well, there are more species of plants and animals in the region than anywhere else on earth. One in five of the world’s bird and animal species live in the trees and waters of the Amazon; overall, one in 10 of the world’s identified species call the area home.
Earlier: 6 Strange & Scary Plants (Slideshow)