Turkey has a huge history because this history comes from the Ottoman Empire. So, there are many places to visit for international visitors. For example, you might find both modern places and historical areas in the same environment. Istanbul (Constantinople) was/is the most charming city in Turkey because this city has lands in both Asia and Europe continents.
Basilica Cistern
This ancient cistern was built under the city. (More info: Basilica Cistern)
Aya Sofya (Hagia Sophia)
This place was built by I. Justinianos in 537 as a cathedral. After the conquest of Constantinople, it was used a mosque in 1453. Then, it is decided to use it as a museum in 1935 by Ataturk. (More info: Hagia Sophia)
Topkapi Palace
This palace was built in 1478 by the Conqueror Fatih Sultan Mehmet Sultan. Sultans lived in this palace for 400 years. Then, this house was used a museum. (More info: Topkapi Palace)
Blue (Sultan Ahmed) Mosque
This mosque is one of the most popular and biggest mosque in Istanbul. 10.000 people can pray there at the same time. More info: (Sultan Ahmed Mosque)
Süleymaniye Mosque
This is the largest mosque in Istanbul. More info: (Süleymaniye Mosque)
Galata Tower
This tower was built in 1348 A.D. You can take some great panoramic picture there. (More info: Galata Tower)
Maiden Tower
There are some stories about this tower. It was built for love. (More info: Maiden Tower)
Grand Bazaar
This bazaar (market) is the longest and oldest bazaar in the world. You can find thousands of stores among the covered streets. Hundred thousands of people go there in a day. (More info: Grand Bazaar)