starting point of various tours x Istanbul, it is ...

starting point of various tours x Istanbul, it is worth mentioning bigbus that for 45euro offers 24 hours by bus to cover 2 itineraries where you can get on and off at will, red line every 30 minutes blue line every 60, 2 hour tour in the Bosphorus by boat and a couple of entrances to miniturk and naval museum, during traffic hours they are a bit slow but all in all, if there is little time, they give way to visit the city well, an alternative to public transport, fully usable thanks to the Istanbul card, they can also said shuttle bus to the new airports. always every 30 minutes, always usable with the card, do not be smart trying to get on without tickets, it is not welcome.
Arrival point to visit the blue mosque, Hagia Sophia, Cistern and tookapi, very interesting buildings, free blue mosque, the others for a fee, unfortunately there is often a lot of queue to enter, there are various guides and more that offer fast entry with a surcharge skipping the queue, pay attention to the restoration work, you risk paying and seeing little, make sure you know what you are going to look at.