Photomap is a library of photos indexed by location. The index is presented as a map overlayed with markers indicating the location of photos in the library. Selecting the markers enables viewers to see the photos and in some cases watch video or hear audio clips of media taken at that location. Tools are provided to edit the index and add media.
Photosearch: by typing in an existing photo number (e.g 2202) the Photosearch button will take you straight to that page.
There are other links on the photo location pages (such as this one) that show you nearby photos - either as a list of photos that are increasingly farther from the current photo, or as a photo-map. You will also find links on that page to view the next or previous numbered photo, or later / earlier in time (this can be useful if you want to follow photos taken on the same day or journey).
The Index of Galleries provides a mega-index to all the public photos in the system.