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 dayTQ1402 : Worthing Observation Wheel by Paul Gillett
Viewed from the pier
Today's Photo of the dayULB9793 : Hagen, Neubau der Lennetalbrücke (A45) by Michael W
Die westliche Hälfte der Brücke (Fahrtrichtung Frankfurt) ist bereits fertig, die östliche Hälfte (Fahrtrichtung Dortmund) wird noch gebaut.
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.