I've just added a "map view" to worldinpictures.org¹. There's now a couple of links below the search results to switch between "gallery view" and "map view". Select "map view" to see the location of the photos on a Google Map. Hover over a marker to see the photo title, click the marker to see the image.

There's a couple of things I need to improve but I thought it was useful enough to release as is. It needs to cope better when several photos have the same location - at present only one of the photos will be available on the map view. I might have a look at using tabbed info windows to cope with this.