The continent known for having the largest rainforest is South America, primarily due to the Amazon Rainforest. The Amazon is the largest tropical rainforest in the world, spanning over 5.5 million square kilometers (2.1 million square miles) and covering parts of several countries, including Brazil, Peru, Colombia, and Venezuela. This rainforest is renowned for its incredible biodiversity, housing an estimated 10% of all known species on Earth. The Amazon plays a crucial role in regulating the global climate and producing oxygen, making it a vital ecological region with significant importance for environmental conservation efforts.