Guarulhos, Brazil

With a population of 787,866, Guarulhos is the second most populous city in São Paulo state and the 13th largest in Brazil. However, the reality of living here is far from picturesque - the city's rapid industrial growth has led to a persistent bureaucratic headache, and Guarulhos' humid subtropical climate can be a challenge. The São Paulo/Guarulhos International Airport, the largest in Brazil and South America, is a major draw, but the city's status as an economic powerhouse comes with trade-offs. Unless you're prepared to navigate Guarulhos' red tape and climate, this municipality may not be the right fit.