american english - What does the word "whereabouts" mean, and how do I respond to it?

If someone asks me the following questions after I tell them I'm going to be in a certain country, what specifically do they want to know? For example,

Someone: "Oh, so you are going to Indonesia. Whereabouts in Indonesia are you going? Do you plan to go to Jakarta, the capitol city of Indonesia?"

and

Me: "Yes, I do plan to make a stop in Jakarta. After stopping there, I plan to keep my whereabouts a secret!"