What other movie or series has a multi-layered / mirror world like the “upside down” in Stranger Things?

Stranger Things season 5 is upon us. (Spoilers ahead – but not for Season 5, for the *previous* seasons).

And watching the scenes with the "upside down" made me think about this:

There are a lot of movies or series where there is a portal, doorway etc to "the underworld" or another place, sometimes even quite nice worlds.

But in Stranger Things it's different, because the "upside down" is like a mirror to the real world, it has similar buildings, places, a similar map…

Like a dark copy of "our world".

So what other media has this?

Could be any "copy" of our world, maybe even a better one, or a more infernal one.

Or even more layers.

But it most be a "copy" somehow. Not just a getaway to "planet hell" in a far away galaxy.