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 dayST9326 : Old Wardour Castle  by Michael Dibb
Seen from within the bailey is the Gothic Pavilion built in the late 18th century as part of the landscaping of Old Wardour Castle's bailey which was used as pleasure gardens for new Wardour Castle. Originally a banqueting hall, the building is now ...
Today's Photo of the dayUPE1664 : NSG Wakenitzniederung by Sebastian und Kari
Random photo (doesn't have a daily photo)WV3581 : Looking north from Les Rocques Barrees Road by Chris Gunns
Vale Mill converted into an observation post
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.