This bus route is basically a free scenic tour along the Golden Horn waterway. Goes from Eminönü to Eyüp Sultan Mosque, costs standard istanbulkart fare. You get great views of the old city, Galata Bridge, and historic neighborhoods without paying for expensive boat tours.

Sit on the right side going towards Eyüp for best water views. Route passes through Fener, Balat, Ayvansaray - all those colorful neighborhoods tourists love but usually only see from pricey Bosphorus cruises.