National Geographic for Kids compressed it the best way:
Turkey is a large peninsula that bridges the continents of Europe and Asia. Turkey is surrounded on three sides by the Black Sea, the Mediterranean Sea, and the Aegean Sea. Istanbul, the largest city in Turkey, is built on land in the Bosporus seaway. The city is partly in Europe and partly in Asia. Turkey is larger than the state of Texas.
Turkey is one of the most earthquake prone areas on Earth and has suffered from 13 earthquakes in the past 70 years. The North Anatolian Fault extends hundreds of miles from the Sea of Marmara in the western part of the country to the Eastern Anatolian Highlands. The fault moves back and forth about 8 inches (20 centimeters) a year.
If you have never been, try to visit Istanbul at least once in your life!