You may get lost by the amount of Specialty Coffee Bars of Istanbul. How ever i have stayed there few days i couldnt make it to visit them all. You will be able to see the most expensive espresso machines and grinders. Most of the Coffee Bars open till late in the evening so you don't need to hurry ;) The city offers a very old coffee culture and history as well, so whenever planing a sight seeing dont forget to add the Specialty Coffee Bars to your map!
Petra Roasting & Co.