You can quickly find photos of a specific location with the Search bar. Start typing the name of a location, and Phototheca will suggest a few appropriate options:
The pushpin icon on the left indicates that the suggested item is a location. Please select a location from the list to see photos related to it.
Location data can be used to make queries in Smart Albums. There you can make criteria based on location name:
Or criteria to find photos that are not geo-tagged yet: