This is Belgrade(local says Beograd), capital city of Serbia. Its mean is White City.
In this photo you can see meeting point of Sava(at the left) and Danube(at the right) rivers. It is really impressive and incredible. Also, there is a small island at that point. You can differentiate water of each river more than 1 kilometer after joint point. It is summer(August) time.
Photo is taken from Kalemegdan(Castle Square) that is a high hill at Old Belgrade side.
Enjoy