Geograph is a concept and open source code for a online website to create a comprehensive collection of photographs capturing every part of given region.
Currently there are three active projects, shown below - including a photograph from each.
Today's Photo of the daySP6737 : The Queen's Temple by Des Blenkinsopp
Dedicated to Queen Charlotte, wife of King George 3rd. As with many of the buildings at Stowe, the politics of the era is all part of the grand design. The role of Queen Charlotte is covered in this article, http://faculty.bsc.edu/jtatter/queens.html ...
Today's Photo of the dayUNV1416 : Schloss Ludwigsburg und Blumenbeete by Bicycle repair man
Geograph Britain and Ireland, also has a slightly simplified site schools.geograph.org.uk intended for use within Schools.
... and a sub-project just focusing on images in Ireland, www.geograph.ie.
Geograph Germany/Deutschland, also has a German/Deutsch language version at geo.hlipp.de.