although not easy to reach, it's one of the best and must visit places in İstanbul. The view is incredibly amazing, especially during nice and clear weather. Highly recommend you to have a cup of Turkish coffee while enjoying the view. You may see many lovers enjoying the romantic view :)
Close to Sultan Ayup area (walking distance), ride the cable cars to the top and enjoy the views, its a short ride but worth it, the whole area is surrounded by a cemetery so be sure to be comfortable by that.
The machine where you buy the ticket for the cable car is very confusing. You can buy only 1 card then top it up and use. We paid 10 TKL and got a card and enough credit for 3 people to use the cable car. Unfortunately there are no instructions in English which would make so much easier for many...
Pierre Loti was a French naval officer and orientalist who lent his name to a rather modest cafe. The cafe is not spectacular, but the view over the Golden Horn is. It;s a favourite day out for the people of Istanbul. It's a bit out of the way. It would be a half-day trip. You can also take the cable...
Pierre Loti perches in a cemetery (really) and has a great view of Istanbul. Have a real Turkish coffee and venture inside and watch them make it in an old open fire in the classic copper pot. Great experience.