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 daySE8594 : The derelict Saltergate Inn by Pauline E
View from Saltergate Brow. The A169 Pickering to Whitby road runs through the scene.
Today's Photo of the dayUNU7687 : Erpfenhausener Heide by Thomas Laidler
Unterwegs auf dem Weg über die Erpfenhausener Heide. (On the way over the Erpfenhausener Heide.)
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.