The first picture is the now defunct Rolling Acres Mall in Akron, Ohio. I didn't even have to Google it
Nothing, however beats the (Now Demolished) Dixie Square Mall in Harvey, Illinois. That mall sat vacant for 30-40 years and, in terms of abandoned retail pictures, was like hitting a goldmine. It was probably hazardous to go in due to all the leaks and mold but the photos were definitely interesting.
I look up 'dead malls' when I get bored
Anyway, It depends on how 'abandoned' it is.If there's weeds growing through the building, I wouldn't go in.
