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 dayTQ2073 : The Lower Pen Pond, in January by Stefan Czapski
The temperature was about zero, and the ponds were partly frozen over. The leaning tree in the foreground is an alder, still carrying last season's cone-like fruit - along with catkins, in readiness for the coming spring. ...
Today's Photo of the dayUUU7674 : Gransee - Touristamt (Tourist Office) by Colin Smith
Rudolf-Breitscheid-Strasse Ecke Hospitalstrasse - bei der Hospitalkapelle.
Geograph Britain and Ireland, also has a slightly simplified site schools.geograph.org.uk intended for use within Schools.