Turkey is a safe country overall and most foreign travelers visit it without facing any significant risks. However, there are a number of things to keep in mind to stay on the safe side.
The Turkish border with Syria is dangerous to travel to and should be avoided due to the ongoing military conflict there. The Turkish border with Iraq is less tumultuous, but should also be avoided for all non-essential travel because of sporadic violence and attacks carried out by the Islamic State on the other side of the border.
Large parts of Southeastern Turkey are also unstable and experience sporadic conflict between the Turkish army and militants. While the cities of
Gaziantep and
Adana are relatively safe, the city of Diyarbakir has experienced fighting in its streets and is not considered safe to travel to. If you intend to travel to Southeastern Turkey, check the latest security update and consult your Ministry of Foreign Affairs and the embassy of your country in Turkey.
In Southeastern Turkey, and sometimes elsewhere in the country, you might encounter security checkpoints of the Turkish army. Do not feel threatened as they are there for your safety, but do follow their advice regarding the security situation in the region.
That said, venturing into southeastern Turkey when it is safe to do so is an adventure of a lifetime. Those who do so will experience hospitality that is second to none and get to visit some of the most incredible places in the world, all without huge crowds of tourists. Mount Ararat (Mount Ağrı officially), Lake Van, the historic hillside city of Mardin with its stone buildings, and the ancient city of Urfa are all places that you will never forget visiting.
While the border area between Turkey and Armenia is not especially dangerous, the border between the two countries is closed.
Turkey has a fairly large share of reckless drivers and road accidents are, statistically, by far the largest risk to a traveler in the country. Use common sense and be extra cautious when driving in areas with inadequate lighting and mountainous areas after dark.
Turkish police are overall trustworthy and you should not hesitate to contact them if you're in trouble. The police number in Turkey is 155. There are English-speaking tourist police units in Istanbul and a couple of other large cities. In rural areas, you likely should contact the military police — their number is 156.
More than 95% of the inhabitants of Turkey are Muslims. While the country is fairly secular, especially if compared to its Middle Eastern neighbors, you should always stay respectful of local customs and religious matters. It's also probably a bad idea to discuss the current government, the animosity between the Turks and the Kurds, or the ongoing conflict in Syria.