The primary feature of the Amazon Basin is its extraordinary rainforest, which is the largest tropical rainforest in the world. Spanning across several countries in South America, including Brazil, Peru, and Colombia, the Amazon Rainforest possesses an unparalleled level of biodiversity, housing millions of species of plants and animals. It plays a crucial role in regulating the Earth's climate and is often referred to as the "lungs of the planet." The Amazon Basin is vital for global ecology, contributing to climate stability and providing resources for indigenous communities and biodiversity conservation efforts.