One of my favorite sites for taking pictures in Istanbul is the colorful Spice Bazaar. The Grand Bazaar has more drama as you try and navigate its corridors without buying a carpet but the spice bazaar, which opened in 1597, has a few less tourists and a few more things that I actually want to buy. It is still a very approachable place for English speaking tourists, but since the spices they are selling flavor the food you have been eating it may also have more meaningful souvenirs.