Istanbul is a romantic city with seas, buildings, humanities and religions. Both natural and cultural flavors are very strong. If you come to Istanbul, you'll surely visit its old city. To tell the truth, the old city is really not very big. The famous blue mosque, St. Sophia Cathedral, the old palace and other famous scenic spots are all here. But I personally like the old city very much, located in the European urban area, a variety of exquisite and distinctive shops, which have very distinctive ornaments. Then there are many famous dessert shops, Turkish candy shops and so on, which are worth exploring. Also, the streets here are very clean, and some of them can see the Bosporus Strait directly. It's really very romantic. Many streets have flowers blooming at will, which is really romantic.