Geotags are a wonderful way to find out where someone is, and many people use this service to find out where other things in their lives are. Many sites will let you search for your own photos using keywords, such as "geotagged: San Diego". You can save the photos to a photo album or a web site and use it to look back on later. There are also services available that will tell you the exact locations where the photos were taken.
https://www.montdigital.com/geo-tagging
