The Photos app 
creates collections of your photos and videos in the Places album based on where they were taken. View photos taken in a specific location, or look for photos taken nearby. See a collection of all your places on a map, or even watch a memory of a certain place.
Browse photos by location
Open the Photos app
on your iPhone.Tap Albums, then tap Places.
Select Map or Grid view.
Only pictures and videos that have embedded location information (GPS data) are included.
Tip: Pinch the map to zoom in and out, or drag to see more locations.
See where a photo was taken
Open the Photos app
on your iPhone.Open a photo, then swipe up to see photo information.
Tap the map or address link to see more details.
To change the location or address where the photo was taken, see Change the date, time, or location.
Watch a location-based memory
Open the Photos app
on your iPhone.Tap Albums, tap the Places album, then tap Grid.
Find a location with several images, then tap the name of the location.
A memory appears at the top of the screen, and a photo collection below it.
Tap
in the bottom-right corner of the memory to play it.
in the bottom-right corner of the memory to play it.