Humaitá, Brazil

With a population just shy of 39,000, Humaitá is a sleepy Amazon outpost that will test the patience of even the most seasoned expat. The city's isolation is a double-edged sword, as the Trans-Amazonian Highway provides a vital link to the outside world but also exacerbates the area's notorious bureaucratic tangles.

Humaitá's saving grace is its natural splendor - the municipality contains protected swaths of cerrado savanna and Amazonian rainforest. However, the relentless tropical heat and humidity are an ever-present challenge.

In short, Humaitá is best suited for adventurous souls seeking an off-the-grid lifestyle, not those accustomed to modern comforts and conveniences.