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 daySD7579 : "British India Line" on Ribblehead Viaduct by Mary and Angus Hogg
Day 2 of the Great Britain XI Railtour saw the Merchant Navy Class locomotive 35018 "British India Line" hauling the train on the Settle-Carlisle line. The Ribblehead viaduct is one of the classic photographic spots on this scenic route.
Today's Photo of the dayUMU9598 : Magstadt: Steinbruch by Andreas Gmelin-Rewiako
Geograph Britain and Ireland, also has a slightly simplified site schools.geograph.org.uk intended for use within Schools.
... and a sub-project just focusing on images in Ireland, www.geograph.ie.
Geograph Germany/Deutschland, also has a German/Deutsch language version at geo.hlipp.de.