Istanbul ferries go back centuries and have become the city symbol. Locals take this super exotic voyage from Europe to Asia without even thinking how special it is. The harbor is packed with tourists feeding hundreds of seagulls waiting for their simit sesame seed bread and weeping like mad. Give them some crumbs and drink herbal tea from tiny cups looking at the horizon. By the way, when Istanbul had no bridges (the first was built in 1973) ferries still looked the same though journeys were taken serious compared to a ride to another city.