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 dayUMV9409 : Flacht: Flur "Rommelshalden" by Andreas Gmelin-Rewiako
Wegekreuzung in der Flur "Rommelshalden".
Geograph Britain and Ireland, also has a slightly simplified site schools.geograph.org.uk intended for use within Schools.