Is there a particular word (slang or not) or perhaps a phrase that describes a location or place you've already visited?
"All the old familiar places"
has a page all of its own, But since the phrase has been appropriated, not to say subverted, by the Joker, 'haunts' might be a better choice
plural noun: haunts (This is the Google response)
1. a place frequented by a specified person. "the bar was a favourite haunt of artists of the time" synonyms: hang-out, stamping ground, meeting place, territory, domain, purlieu, resort,
Collins gives both verb (haunt) and noun (haunt / haunts)
haunt (verb) Collins Dictionary
to visit (a place) frequently
(often plural) a place visited frequently "an old haunt of hers"
From the Oxford Dictionary
Sojourn - Stay somewhere temporarily: i.e. she had sojourned in Egypt
Tour - A short trip to or through a place in order to view or inspect something, A journey for pleasure in which several different places are visited, i.e. they had toured in a little minivan
Of places that I had visited often in the past, I refer to them as my stomping grounds. This would generally refer to the area around the university I attended, where I spent summer vacations regularly, or where I grew up.