Locations have a field called address. This field automatically populates as you start typing the address. If the address is found it means it can be displayed in a map.
To create a map view, click on Locations on the top menu and then click on the cog icon for views and then click on New.
On the new screen enter a name of the view and from the type field select Map:
Then click Save.
Automatically you'll be switch to the map view and it'll show the locations: