Rio Branco, the capital of the state of Acre, is built on the river Acre and has strong indigenous influences, as well as those from the North East region of Brazil. Rio Branco is one of the most insulates capital cities in Brazil; the nearest capital is Porto Velho (about 540 km away), in Rondônia, but this is an insulated city itself; the major city nearest Rio Branco is Manaus, the capital of Amazonas, which is 1445 km away (a few days in a boat, the most common means of transportation in Acre).