I run a set of website that lists weather reporting locations around the world. I link to images in Flickr either based on Geotag information, or based on the following tags:

wxtagged -- the master tag

wx:metar=xxxx -- this is a metar site with code xxxx

wx:wmo=12345 -- this is a wmo site with code 12345

wx:cwop=cw9999 -- this is a cwop site with code cw9999

wx:station -- this is a picture of the station itself rather than the location.

The resulting page can be seen at weather.gladstonefamily.net/site/xxxx -- for some site xxxx