Continuing from Birjolaxew's discovery of
Popcorn, Indiana, USA,
1 is
Accident, Maryland, USA:

2 is
Chicken, Alaska, USA:

3 is
Devil Town, Ohio, USA:

4 is
Experiment, Georgia (state), USA:

5 is
Hell, Michigan, USA:

6 is
Popcorn, Indiana, USA, as already discovered by Birjolaxew.

7 is
Sandwich, Massachusetts, USA, as already discovered by tjs352.

So the connection is,
as you said, the devil from hell doing an experiment to combine a chicken sandwich and popcorn by accident. I don't know if there's any significance to all the places chosen being in the USA - e.g. instead of choosing the more famous Sandwich in England which gave its name to the food called a sandwich - but the USA is certainly known for its odd place names which could be standard English words!