Porto Velho (Rondônia, Brazil)

Porto Velho (Portuguese pronunciation: [ˈpoʁtu ˈvɛʎu], Old Port) is the capital of the Brazilian state of Rondônia, in the upper Amazon River basin. The population is 460,434 people (as of the IBGE 2022 estimation). Located on the border of Rondônia and the state of Amazonas, the town is an important trading center for cassiterite, the mining of which represents the most important economic activity in the region, as well as a transportation and communication center. It is on the eastern shore of the Madeira River, one of the main tributaries of the Amazon River. It is also Rondônia's largest city, and the largest state capital of Brazil by area. Porto Velho is one of the most dangerous cities in the world, being the worst Brazilian capital city with sanitation and the worst to live in. The municipality occupies most of the border between Amazonas and Rondônia, and is both the westernmost and northernmost city in the state.