What is this movie!???

Dear all. Ive been looking for this movie for a very long time. It is a movie about humans had to live on high grounds(side of the cliffs) as to avoid being captured by aliens/monsters/martians if they are on ground

Can kind souls help me out with the movie title? Thank you very much

Battlefield earth?

In my opinion, I remember such shots in the movie "Time Machine" based on the book by Herbert Wells