Everything has an end, also Istanbul, even if it seems incredible, ends somewhere. If you want clearly see from the high the limit of this powerful and terrific city you should go to the Yoros Castle.
It is the most beautiful and oldest and not so much know of the castles of Istanbul; Yedikule in the Golden Horn, Rumelihisarı in Europe and its Asian twin Anadoluhisarı placed one opposite to the other in the shore of the Bosphorus near the Fatih Sultan Mehmet bridge, and Rumeli Feneri castle placed in Europe in the opposite shore of the Yoros castle near the entrance of the black sea. The Yoros Castle is on the top of a green hill that now as long time ago, is occupied by soldiers of the Turkish army. Part of the hill where rise the castle is now an inaccessible military zone. On this subject, we should open a parenthesis for all those who are unfamiliar with Istanbul. Here, inside the city, the only large forests that have withstand to the speculation are those occupied by the army. This is on the one hand the salvation of places like this hill that would otherwise have been invaded by new construction on the other it is a real pity for all the inhabitants of Istanbul who cannot enjoy these areas and on sunny days are crowded in the public parks and along the shore of the Bosphorus to eat and stay together.