The feature is called Significant Locations, and it is buried deep within iPhone's reptilian brain.
Want a peak?
- Open Settings
- Open Privacy
- Open Location Services
- Scroll to the very end and open System Services
- Keep scrolling until you hit Significant Locations
- At this point, you will need to sign in again.
Significant Locations may include the locations of, and frequency of visits to, significant others, whom you would rather not have your other significant others know about.
Or, if you are an investigator, it just might help you crack a case!
~Kevin