When you research your next travel destination, it’s always wise to consider where it ranks in terms of safety and risk to foreign travellers. The Economist Intelligence Unit has published the Safe Cities Index (SCI) for 2021, scoring international destinations on personal safety and digital, health, infrastructure and environmental security – with an overall score out of 100 – making it a handy tool for tourists. Using this data, we've ranked the 10 safest cities in the world, followed by the 10 most dangerous.