Açu, Brazil

With a population of just 56,496, Açu is a far cry from the glittering metropolises that often lure expats. The Açu Formation, a geological feature of the region, may be of interest to paleontology nerds, but for everyone else, the persistent bureaucratic headaches are a more pressing concern. Those seeking an off-the-beaten-path experience could find Açu's remote, fluvio-deltaic charms appealing, but the lack of major economic opportunities means this small city is best suited for retirees or digital nomads content with a slower pace of life.