Camaragibe, Brazil

With a population of 99,407, Camaragibe is one of the most densely populated urban areas in the world. The city's accelerated growth since its 1982 independence has come at a cost - bureaucracy is a persistent headache, and the hot, humid climate is relentless. Camaragibe's economy is driven by commerce and industry, centered around a major metropolitan transit hub. However, the city has a dark side, as it is home to a suspected serial killer. Overall, Camaragibe is a dense, fast-paced city that may appeal to those seeking urban amenities, but the challenges of daily life there are not to be underestimated.