Harrogate, United Kingdom

With just 4,400 residents, Harrogate is a sleepy college town in Tennessee, lacking the amenities and excitement of bigger cities. While the population has grown steadily thanks to Lincoln Memorial University's expansion, the town still grapples with outdated infrastructure - a new sewage system was only built in the late 2000s to address contamination issues. And for all its rural charm, Harrogate has an aging population, with over a fifth of residents 65 or older. This is a place best suited for retirees or students content with a slower pace of life.