Australia is home to the world's oldest tropical rainforest. The Daintree Rainforest located in Tropical North Queensland about 3 hours north of Cairns is the oldest tropical rainforest in the world! This relatively small but stunning corner of Australia is estimated to be anywhere from 35 million to 180 million years old, which is at least 10 million years older than the Amazon Rainforest. The Daintree Rainforest is also special because it's a World Heritage Site.