Tours of the Bosphorus start from this pier. The longer one will take you as far as to Fatih Sultan Mehmet Bridge.
While waiting for your boat, you can enjoy the hustle and bustle of this place. There are many locals fishing and also plenty of restaurants offering various dishes including famous fish sandwich.
Check the timetable online.
Prices range from TRY 12 to TRY 25 according to the trip length.
Tours official website http://en.sehirhatlari.istanbul/en
Address 10/1 Ragıp Gümüşpala Caddesi, Fatih 34134, Turkey
Coordinates 41°1'9.958" N 28°58'7.972" E