What films create a world that the audience can expand?

Hello all,

As I am analyzing films on MediaTag.io blog, I made a list of films that enable the audience to imagine a world bigger than the one presented.

The ones I found are:
- Alien
- Blade Runner
- Starman
- True Detective
- Thelma & Louise
- Contact

Here is more details about each: https://mediatag.io/blog/allow-audiences-to-expand-your-story

Can you think of any other films that use similar techniques?