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 dayNX2394 : Hadyard Hill Wind Farm by Mary and Angus Hogg
The edge of the wind farm site, viewed on a bright March morning.
Today's Photo of the dayTPT1974 : Ruine Hohenfreyberg (Ruin Hohenfreyberg) by Christian Lipp-Thatsuphan
Blick von der Ruine Eisenberg zur Ruine Hohenfreyberg (Winter 2008) (View to ruin Hohenfreyberg from ruin Eisenberg (winter 2008))
Random photo (doesn't have a daily photo)WV6550 : VallÃ©e des Vaux by DS Pugh
Looking along Vallée des Vaux to the north of St. Helier.
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.