I'm gonna take a guess that you're referring to our Mirage Spots location page. I added all those from the ORAS data but never got around to naming them properly.
Anyway, the specific location for Area 1 is a forest Mirage Spot east of Mossdeep City.
I'm assuming you're asking about the Safari Zone, because that's the only place in OR I know of that has an "area 1". The Safari Zone's area 1 is in the southeast corner.