La Unión, Colombia

With a population of just 41,013, La Unión offers little to attract the average expat. The town's history is marred by political violence, with over 5,700 members of the leftist Patriotic Union party murdered in the 1980s and 1990s. Bureaucracy is a persistent headache, as the party only regained its legal status in 2013 after being stripped of it over a decade earlier. Those considering a move to this remote corner of Colombia would be wise to think twice - the risks likely outweigh any potential rewards.