Well the first things that popped into my head when I saw the prompt Big are the lighthouses of Chennai. I also think lighthouses make great subjects to test different POVs. You can put them afar in the frame and make them standout against the sea.
Or you can get up close and make the entire photo about them like I’ve done below.
The below is the main lighthouse of Chennai adjoining the Marina beach. It was just a bit of serendipity that the morning sun was right behind it when I captured this shot 🙂