A project originally funded by the Royal Geographical Society (with IBG) with an Innovative Geography Teaching Grant to develop teaching ideas for using Google Earth in the Geography classroom, expanded to include ArcGIS Online in 2014
The Map of the Week blog has been around for quite a while - dating back to 2005 (which is about the time I started some of my blogs). Produced by Dug from Massachusetts, USA.
Why not lose yourself by digging into the archive for a few hours...