Colima, Mexico

With a population of just 731,391, Colima ranks last among Mexico's states - but don't let its small size fool you. This coastal enclave has one of the country's highest standards of living and lowest unemployment rates, but it also grapples with a notorious crime problem. Over 94% of residents live in cities like the capital and Manzanillo, the state's key commercial port. While the region boasts beautiful beaches and colonial charm, the US State Department warns that the entire state is so dangerous due to cartel violence that Americans should avoid traveling there altogether. Those seeking a safe, low-key Mexican getaway would do better to look elsewhere.