Potential Investment Area Ratings/Rankings?

Hey! Wanted to ask...are there any sites out there that "rank" or "rate" a city or area that someone might be interested in investing in? 

I'm new to all of this and I know there is a ranking system for properties(A, B, C, etc), but didn't know if something like that exists for locations? 

I know of city-data.com and crimereports.com, so maybe it's a matter of just practicing due diligence from word of mouth/research/guy feeling? 

Any advice/insight is highly appreciated. Thank you!