Several people have asked me for a way to view the most photographed
monuments.
This tool is now implemented
http://toolserver.org/~platonides/wlm/monuments.php
The most photographed monument from all countries* is Colombian 06-050,
with more
than 2000 photos. Although that identifier spans the old sector of the
city of Tunja,
so it's not really fair to compare it with 'conventional monuments' with
are a statue
or a building.
* Disclaimer: If your country doesn't use identifiers or removes the
identifiers from
the description page, it is obviosuly not properly represented there.