One obvious feature would be to provide geo fenced Wikipedia or news feed.
Like what is the highest rated/longest Wikipedia article in the area.
Or maybe what's the 3 top radio stations and a link to them.
There is plenty of local content that Google does not surface
Geo fenced Wikipedia exists already, as a number of apps are available which offer regional maps with localized Wikipedia additions, see for example https://wiki.openstreetmap.org/wiki/OsmAnd
I could do that. Have additional information about the area based on the perimeter.
These are great ideas!