A friend told me how she and the whole family were visiting some Greek or Roman (or both) ruins in Cyprus, where none of them had ever been before.
Immediately they arrived, her little grandson (still pre school, no more than 4, certainly unable to read) said, ‘I used to live here!’ And went on (very happily) to point out the remains of his house, and his friend’s house - he even gave an appropriate but slightly garbled name for him), and the cave where they used to hide, and the pool (bath) where they used to swim.
Needless to say, the rest of the family were seriously spooked!
When they eventually left, he said, quite happily, ‘Thank you for bringing me home.’
He’s now a teen and has no recollection of any of it. And AFAIK never made any mention afterwards,
Interestingly, he has part Greek Cypriot heritage on one side, and part Italian on the other.