Undoubtedly, Istanbul is one of the most unique and incredible cities I've ever visited in the world. If you know my travel style, you know I tend to be underwhelmed by a country's biggest cities, but Istanbul is unlike any other city I have visited. The city's rich culture, deep history, mouth-watering cuisine, and gorgeous architecture, make it a must-visit. While you could easily spend a week or more wandering this beautiful city, a minimum of four days is needed to do it fair justice. During our trip to Turkey, we allotted only three days to the city, and without a doubt, wish we had at least one more day.