After crossing the Black Sea, we have to navigate the Bosphorus Straits, separating Europe and Asia. We are literally cutting in the middle of Istanbul (as 1/2 is on each continent).
 
Looking back from the ship, we can see one of two bridges that cross continents. On the left, Europe, on the right, Asia.
The Europe side of Istanbul has most of the commercial districts. 
Since many of the residential districts (of the 4 million + city), million commute each day by ferry, 
Below, the blue mosque (left with it's 6 distinctive minarets) and Topkapi Palace. 

 Next stop, Kusadasi