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 daySD8687 : South of West Shaw by James Allan
Looking along Beggarman's Road.
Today's Photo of the dayUVV4571 : Radfernweg:Berlin Usedom - Insel Usedom by Kerstin Breitlow
Geograph Britain and Ireland, also has a slightly simplified site schools.geograph.org.uk intended for use within Schools.