Since he's mentioned it to people before, Izuku will let others who may not already know that the trash covered beach- Takoba Beach- is near identical to one back home where he's from, though it shouldn't be covered in trash anymore. So far there hasn't been anything else he's recognized.

He'll also briefly mention without going into deep detail that he's been through this once before, having been taken from his world originally and brought to a world between worlds called Fellden (Izuku is a game CRAU). He'll elaborate further if asked (though he realizes it's a lot to take in after a handful of conversations about it with others), but the long and short is that he's been around this block before. Right now though he's coming to the conclusion that he's not certain that everyone being brought here has anything to do with what was going on in Fellden before, mainly because nobody else is from there.