Tumen, China

With a population of 85,248, this county-level city in Northeast China is hardly the picturesque border town some expats might imagine. The reality is a persistent bureaucratic headache, as over half the residents are of Korean descent and the city sits just across the river from North Korea, making it a common route for defectors. While the riverfront promenade offers views into the neighboring country, the large detention center is a stark reminder of the region's geopolitical tensions.

Tumen is not for the faint of heart. The climate is harsh, and safety can be a concern given the city's role as a transit point for those escaping North Korea. Unless you're prepared to navigate a complex web of regulations and potential risks, this is probably not the ideal landing spot for your overseas adventure.