Google Photos doesn't show people album outside US
One of the coolest new Google Photos features is "Group similar faces", which automatically detects faces in photos and groups them in "people" albums. Unfortunately, this option at the moment is only available in the US. The good news is that there is quite simple workaround that lets you to enable "Group similar faces" wherever you are.
The trick is to fool Google Photos that you are connecting from United States. The best thing is that this only needs to be done once (to enable "Group similar faces" option). After this is done, the feature will work regardless of where you are connecting from.