Part of the city's allure is its setting, where Europe faces Asia acr?­oss the winding turquoise waters of the Bosphorus, making it the only city in the world to bridge two continents.
The fact that the city bridges two different continents makes it more appealing to visitors. 
mnli hypothesis: The fact that the city bridges two different continents makes it more appealing to visitors.  premise: Part of the city's allure is its setting, where Europe faces Asia acr?­oss the winding turquoise waters of the Bosphorus, making it the only city in the world to bridge two continents.