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 daySO0329 : Cradoc Road Cemetery by Jonathan Billinger
The place to rest in peace with a fabulous view of the Beacons.
Today's Photo of the dayUMV9509 : Weissach: Flur "Bonlanden" by Andreas Gmelin-Rewiako
Geograph Britain and Ireland, also has a slightly simplified site schools.geograph.org.uk intended for use within Schools.