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.
Garreg Mach Monastery baby!!! Just seems really cool and the history would be fun to unravel with a very sleepy husband