The map below, created by Statista, shows the 18 countries the Foreign Office advises travellers should avoid.
The threat of Isis also contributes to some travel warnings.
The current advice for Syria is that any Britons currently in the war-torn country “should leave now by any practical means” because the Foreign Office would be unable to provide any consular services.
The map also shows 45 counties deemed partly dangerous due to unrest in certain regions. Included in this is the area of north Sinai in Egypt, where the Russian commercial A321 plane crashed last week. There is now believed to be a significant possibility that the crash was due to a bomb planted on board.
Parts of Russia are also deemed dangerous by the government, including the region close to the border with Ukraine and the area of Chechnya. Areas close to the border with Georgia and Azerbaijan are also warned against.
The full list of countries which the Foreign Office advises British people traveling to: Afghanistan, Burundi, Central African Republic, Chad, Democratic Republic of the Congo, Guinea, Iraq, Libya, Mauritania, Niger, Palestinian territories, Sierra Leone, Somalia, Somaliland, South Sudan,Syria, Tunisia, Yemen.
Countries which the Foreign Office advises against traveling to parts of: Algeria, Angola, Armenia, Azerbaijan, Bangladesh, Burkina Faso, Burma (Myanmar), Cambodia, Cameroon, Colombia, Djibouti, Ecuador, Egypt, Eritrea, Ethiopia, Georgia, Haiti, India, Iran, Israel, Ivory Coast, Japan, Jordan, Kenya, Kosovo, Lebanon, Madagascar, Malaysia, Mali, Nepal, Nigeria, Pakistan, Philippines, Republic of Congo, Russia, Saudi Arabia, Sudan, Tajikistan, Thailand, Turkey, Uganda, Ukraine, Venezuela, Western Sahara.