You come to know more about your country when you go abroad because people in abroad will ask you about so many things which they would definitely not know so in order to answer them you have to define, express, explain certain things or put into words that you lived but didn't see, understand, recognize, feel, etc. These are what makes you miss! You don't recognize the value of what you have in your hands until it's lost. Same story.
Btw missing Sri Lanka. Whenever I see the Turkish flag it would remind me Our Flag. Lankan le ! Sariya le! Adhu le! 😅 (flag in the pic is edited.)