Belford Roxo, Brazil

With a population of over 518,000, Belford Roxo is one of the most densely populated cities in Brazil. While its tropical climate averages a pleasant 26°C, the city's infrastructure struggles to keep up with its rapid growth. Bureaucracy is a persistent headache, with public services and social indicators lagging behind neighboring municipalities. The Iguaçu and Sarapuí rivers that run through the city are heavily polluted, a stark contrast to the natural beauty of the surrounding hills. Overall, Belford Roxo is a bustling, no-frills urban center that may appeal to those seeking an authentic Brazilian experience, but it's not for the faint of heart.