Mauá, Brazil

With a population of nearly 300,000, Mauá is no sleepy village. The high density and industrial character of this São Paulo suburb mean it's a far cry from the beachside idylls many expats imagine. In fact, the city's chronic traffic and flooding issues are a persistent headache for residents. And while the subtropical climate is pleasant, the hilly terrain and lack of flat land creates challenges. On the plus side, Mauá boasts a thriving manufacturing base, home to major global brands like Petrobras, Firestone, and Saint-Gobain. But for those seeking a laidback lifestyle, this gritty industrial hub may not be the best fit.