Oh! Oh! I'd like to add to this with Shannon Dawdy's notion of heterogeneous time as a good contrast. The idea is that some places have a sense of pastness, meaning a sensed quality of belonging to/being of more time periods than just the present. This is inherently tied to the places' identity, as opposed to non-places which have been deliberately constructed to have no particular identity of their own.
Dawdy also talks about bubble time, which is similar to Proust’s mémoire involuntaire: a moment in which “the past suddenly lives again, like a haunting.” THIS is part of what you are experiencing when you encounter an image, or an object, or a place that throws you back into a certain moment in time, a visceral memory evoked by some sort of stimuli.
See also lieu de mémoire, a term which is generally used to describe places where the past is held intentionally close to the present through a process of collective memory-making, but I would also argue that a computer room from 2007 can also fit the definition of "a physical place or object which acts as container of memory."
Liminal does not mean a place (or object) that feels like it belongs to multiple temporalities at once. Liminality is a sense of in-between-ness or not-belonging, whereas nostalgia relies on associations with other times and imbued pastness.
For further reading on this, I would highly recommend Dawdy's Patina: A Profane Archaeology, particularly chapters 2 and 5.
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