I've explored the various links related to this activity, but I'm not really sure that I'm any the wiser as to exactly what these are! The wikipedia definition gave me some basic overview, but having looked at the various links, I still don't really understand what these are basically used for. Some seem to be game related, and others give mapping info, etc, while yet others seem to have lots of people's own personal photos and some blogging info.
Who knows, maybe it will make more sense after I continue with other activities in the weeks to come!
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