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 dayNJ0103 : Loch Avon from The Saddle by andrew ogston
Looking towards Shelter Stone Crags 9th June 2015
Today's Photo of the dayUNA6616 : Würzburg - Kulturspeicher bei Nacht ("Museum im Kulturspeicher" by Night) by Colin Smith
Das Museum zeigt Kunst vom 19. Jh bis zur Gegenwart.
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.