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 dayNM7683 : Beinn na Cloiche Moire by Chris
Looking back to Kinlochailort, overshadowed by An Stac.
Today's Photo of the dayUNV3325 : Oppenweiler, Rathaus by K-H Lipp
Kirche im Hintergrund.
Geograph Britain and Ireland, also has a slightly simplified site schools.geograph.org.uk intended for use within Schools.