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 dayNZ2567 : Suburban Trees at Night by Andrew Tryon
Trees on a misty night in a housing estate in South Gosforth, Newcastle upon Tyne.
Today's Photo of the dayUPF7200 : Rerik, Jungsteinzeitgrab bei Meschendorf by Michael W
Dolmen Meschendorf, ein Gro▀steingrab der Jungsteinzeit (3200-3000 v.Chr.)
Geograph Britain and Ireland, also has a slightly simplified site schools.geograph.org.uk intended for use within Schools.