The Guaíba River is a significant waterway located in southern Brazil, primarily flowing through the state of Rio Grande do Sul. It serves as a natural boundary between the cities of Porto Alegre and Guaíba, eventually emptying into the Laguna dos Patos, which is the largest lagoon in Brazil. The river is approximately 60 kilometers long and plays a crucial role in the local ecosystem and economy. The Guaíba River is known for its diverse wildlife and is a popular spot for recreational activities such as fishing and boating. Its banks are lined with parks and urban areas, making it a vital resource for the communities surrounding it. The river also supports local industries, including shipping and tourism, contributing to the region's development.