Please help me to solve my childhood mystery!

When I was a child, I saw a movie that I have been following for a long time! The subject of the movie: It was a movie about an underground city that had no way to the surface. The people of the underground city had a hard time getting their food. The story of two friends (a girl and a boy) who try to solve the mystery of getting out of the underground city and come to the surface. The girl and boy succeed and tie the road map to a stone and throw it into the ground so that the rest of the city can solve the riddle.

2 Answers

2

Maybe this one?:
“Fuga dal paradiso” (1990), also known as “Flight from Paradise”

Here is a review on the IMDb page of the movie with some plot details:

Unfortunately, this was not the movie. In my film, the boy and girl are very young and live in an underground city.

Well, the boy and the girl are young, and they live underground.

“City of Ember” (2008)

Quote from the below Wikipedia page of the movie, this is how the movie ends, it fits your description:
“So before they explore, they drop a letter with information on how to get out, tied to a rock, into Ember, where it is found by Loris.”
An underground city, a boy (Doon) and a girl (Lina), they reach the surface.

Oh my God . You found the movie for me. thank you very much

You are most welcome, thanks for the follow-up and for confirming the find. Enjoy your childhood movie. :)