Canceled TV shows that didn't get closure. Most of them probably ends with a cliffhanger or unresolved plotlines. (If my memory is correct.)
Adventure or sci-fi I've seen where people travel to places. (The journey is the destination, kind of.)
In Internet aesthetics, liminal spaces are empty or abandoned places that appear eerie, forlorn, and often surreal. Liminal spaces are commonly places of transition, pertaining to the concept of liminality.
Sci-fi, fantasy, horror that contains co-existing parallel worlds.
"Doorways" made from a permanent or semi-permanent fixture linking specific points in time. It can be portals or mysterious objects/artifacts.
