International City, United Arab Emirates

With a population of over 9.8 million, this Emirati city is no quaint oasis. The border with Oman is a patchwork of enclaves, exclaves, and undemarcated areas, creating a bureaucratic headache for residents. Efforts to curb illegal migration have led to a 4-meter barbed wire fence along much of the frontier. While the strategic location commands the Strait of Hormuz, the constant border controls and crackdowns are a persistent irritant for anyone seeking a hassle-free expat life. Only the most persistent and patient should consider moving to this sprawling, security-conscious metropolis.