Tanghe, China

Moving to this city of 278,055 people is not for the faint of heart. The Tanghe Fellowship, one of China's largest evangelical Christian movements, has an estimated 5 million members - a sign of the strong religious presence. However, the group has faced persistent government crackdowns, with over 100 leaders arrested in 2004. Bureaucracy is a persistent headache for residents.

This city is best suited for devout Christians willing to navigate a challenging environment. The large evangelical community provides a supportive network, but outsiders should be prepared for friction with authorities.