Istiklal Avenue in Taksim, Istanbul (Turkey). Independence Avenue) is one of the most famous avenues in Istanbul, Turkey, visited by nearly 3 million people in a single day over the course of weekends.
Pretty sure this is the castle they used in Van Helsing. I must go to it The greatest Gothic-style castle in Romania, Hunyad, aka. Corvinesti castle was built by the Anjou family on the site of a former Roman camp.