Rules: only places that don’t exist, so no “NY from Spider-Man” also if you can limit to a building or little town, not an entire city or map.
My pick: The Spencer Mansion from 1996 Resident evil. I always loved that place. Of course without the creatures.
Aperture Science and Black Mesa Research Facility, they are both huge and filled with high tech.
Don’t forget cake!
The cake was a lie.