Next month I have two 1-day layovers at Istanbul. First is on July from 5am to 7pm and the second is on September from 10am to 7am (next day). I would like to take the opportunity to visit a bit of Istanbul.
For the first layover I've thought of taking the metro from Ataturk to Aksaray and from there go walking to the Blue Mosque and then head to the Taksim square through the Galata Bridge. From Taksim will take a direct bus to the terminal. Does it make sense?
The problem is the second layover. I would like to make a similar walk, but I find the other touristic attractions are dispersed for the time I have. What could be a good walking in Istanbul taking into account that I'll arrive at 10am and have to return to the airport at night?