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 daySO5200 : River Wye at Tintern by Philip Halling
Morning mist hangs in the Wye Valley at Tintern. At the time of the picture it is just past high tide and the river is flowing with a strong current.
Today's Photo of the dayUMV1036 : Rumbacher Teufelstisch by Klaus Graßmück
Tischfelsen bei Rumbach (NSG Brauntal)
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.