1. Aleppo, Syria
One of the most dangerous cities in the world is the Aleppo, Syria. The city is not recommended to travel. Aleppo is the largest city and home to ancient history, culture, sports, arts, and education. This was a hub of the Syrian civil war that began in 2011.
Also, Aleppo’s areas were under siege for many years. Some areas of Syria are still a war zone and not safe for tourists to travel to. Besides this, Syria is the hub of many terrorist activities that make it not secure for foreigners.