The Rio Tapajós in Pará, Brazil is a major tributary of the Amazon River, notable for its clear, greenish-blue waters that create a distinct visual phenomenon where they meet the sediment-laden Amazon near the city of Santarém, a sight known as the "Meeting of the Waters." This confluence is a significant natural attraction. The river is characterized by long stretches of beautiful white-sand beaches and dense, protected rainforest along its banks. The overall character is that of a major Amazonian waterway, with its ecosystems and indigenous communities facing pressures from large-scale development projects, including proposed dams and dredging for a major industrial waterway intended for transporting soybeans. For navigation, although the river is interrupted by rapids, its entire length is considered navigable, and it is possible for rivercraft to travel from the Tapajós onto the Arinos River. The primary urban center and a key access point for the river is the city of Santarém in Pará, which has an international airport. The river is used by typical Amazonian wooden boats for both transport and cargo loading.