You'll have to take a boat out to this one, but it's totally worth it! Take the boat right out to the Maiden's Tower, now a restaurant/café, and take a selfie right in the middle of the Bosphorus from one of its most iconic history spots!
Hagia Sophia
Arguably the most famous building in the world, a shot from inside the Haghia Sophia or outside puts you right in the heart of Istanbul UNESCO World Heritage historic peninsula and in a 1,500-year-old masterpiece!