This needull looks at data to ascertain the most dangerous countries for American tourists. The data that has been used for the analysis is number of deaths of Americans abroad and number of travel warnings issued by the US.
Mexico tops the list with 28 warnings in an 8-year period. It’s worth noting that these warnings are regionally specific, targeting sites where crime syndicates are particularly active. Popular tourist destinations like Mexico City and the Yucatán peninsula (including Cancún) are generally regarded as safe.
Most other countries on this ranking are participants in ongoing international conflicts (e.g., Israel, Pakistan, Afghanistan), or are sites in which extremist groups regularly carry out terrorist attacks (e.g., Mali, Nigeria, Syria).
North Korea is an interesting exception, as the government itself presents a danger to American travelers. According to the State Department, foreigners are liable to be jailed for unspecified reasons, or for seemingly innocuous infractions like interacting with the locals or taking unauthorized photos.