(CNN) -- Thanks to everyone who took part in our mystery photo challenge!
The answer is Durban.
To recap, here are the clues we provided:
Hint 1: The coastal city pictured, is looking over the harbor and the port is one of the largest in the world -- open 24 hours a day
Hint 2: It is a general cargo port and container terminal
Hint 3: The origins of the port date back to 1824