Best places to [city]

I'm trying to figure out the best search results for a given topic like fishing or restaurant.

How would I go about finding the cities with the highest keyword volume?

So if I wanted to know, the cities that have the highest keyword volume for "best places to go fishing in [city]", is there an easier way to do it rather than doing it manually for each city?

I'd like to create a list of the top-ranking cities and target those keywords. Hope that makes sense :)