If you are first time in Istanbul then the first day you should do walking tour. Your walking tour will include the most visited (and most famous!) sites of Istanbul’s historic peninsula. Your old Istanbul walking tour takes you to the imperial centre of the old Turkish Ottoman Empire. Visit the Blue Mosque, Topkapı Palace, The Grand Bazaar and the relics of the Roman (Byzantine) Empire: Hagia Sophia and the Hippodrome. This is one of the most popular visits in Istanbul! All above places in the itineary are walking distance to eachother. You dont need a car if you are fit and healthy