The Tocantins River is one of the main rivers in Brazil. It flows 1,758 miles through several states, including Goiás, Tocantins, and Pará, before it merges with the Amazon River. Synonyms for the Tocantins River include Rio Tocantins in Portuguese, Tocantin in Tupi-Guarani language, and Rio das Almas which means "River of Souls". It is also sometimes referred to as the Araguaia River, as the two rivers meet and form a large delta. The Tocantins River is an important transportation route for goods and people in the region and its tributaries provide water for agriculture and hydroelectric power.