We have 4 full days in Istanbul in February. We are planning on seeing the following - maybe not in the same order:
Day 1 - Hippodrome area, Cistern, Blue Mosque, Aya Sofya.
Day 2 - Topkapi Palace
Day 3 - Half day Bosporus Tour, New Mosque, Spice Bazaar
Day 4 - Grand Bazaar and area around
There are other things in the guide book that I can add if we have time by area.
Question I have is what should we do as a self-guided tour and what should we hire a professional to take us to see with more information?