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 daySS7249 : Lynmouth Before The Flood by Peter Jeffery
The River Lyn flowing through Lynmouth just twelve months before the devastating floods of 1952
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.