Funicular: Here are the following running lines:
Karaköy-Tünel (T) – this line allows you to go quickly down the Istiklal Street and you will avoid climbing the slopes to get in neighborhoods like Galata . Once in Tünel you can use the historical tram (NT) to go to Taksim Square . It runs from 7am to 9pm .
Taksim-Kabataş (F1) – this line allows you to go from Taksim Square to Kabatas . From here you can take the tram (T1) to get to the old town and the boat to the Princes islands in Kadikoy . To go to the old town another option is to take the M2 metro directly to the Golden Horn (Haliç stop) from Taksim.