Q:

What vs. where when talking about a place

Sometimes I feel confused whether to use what or wher when I talk about a place. For example:

What is your destination?

or

Where is your destination?

Which is correct and why?

A:

If you want to know the name of the destination, for example "London", you ask 

What is your destination?

If you want to know the geographical location of the destination, (south-east England), you would ask

Where is your destination?

You might also use where to ask for directions to a place:

Excuse me, where is the Post Office?

When asking about somebody's destination, you probably just want the name, in which case what is the right question-word. 

