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 daySU0128 : Four of the Fovant Badges [western end] by Christine Johnstone
From left to right: The Wiltshire Regiment, The London Rifle Brigade, The Post Office Rifles, The Devonshire Regiment. Cut out of the chalk escarpment by troops in 1916. Restored in 2002-3.
Today's Photo of the dayUTS9195 : Meuschau - Feldweg vorm Deich by BMG1900-Anhalt
Das Foto zeigt einen Feldweg in östliche Richtung entlang des Deichs nördlich von Meuschau.
Geograph Britain and Ireland, also has a slightly simplified site schools.geograph.org.uk intended for use within Schools.