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  1. Istanbul - Wikipedia

  2. 19 Best Things to Do in Istanbul, Turkey | U.S. News Travel

  3. Istanbul | History, Population, Map, & Facts | Britannica

  4. Istanbul travel - Lonely Planet | Turkey, Europe

  5. Best things to do in Istanbul - Lonely Planet

  6. The 34 best things to do in Istanbul - Time Out

  7. THE 15 BEST Things to Do in Istanbul - Tripadvisor

  8. Must-see attractions Istanbul, Turkey - Lonely Planet

  9. 18 Amazing Things Istanbul Is Known For! - The Turkey Traveler

  10. 22 Top-Rated Tourist Attractions in Istanbul | PlanetWare