At around this time of year, many Britons will be planning where to go on holiday this summer. While some may choose to base themselves in a seaside town or beach resort, others may prefer a city break. However, not all cities and not all countries are safe to visit. According to El Pais, one country has 15 of the 50 most dangerous cities in the world. Mexico, South America, has five of the top six most dangerous cities on the World Population Review’s list. Ten other Mexican cities also made the list. The list is made up of cities from around the world and the ranking was created based on the number of homicides per 100,000 inhabitants. Tijuana tops the rankings with 138 homicides per 100,000 inhabitants just ahead of Acapulco which has 111. The highest-ranked non-Mexican city on the list is Caracas, Venezuela which has 100 homicides per 100,000 inhabitants. The most dangerous city not in South America was Cape Town, South Africa, with around 66 homicides. This was just ahead of St …