Sofia Santos shared this over on some other sites. I thought it might be helpful for those using - or looking to use - Google Earth:
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@snyde21 I use it regularly for geoguessing. I follow the youtube channel of a guy who works outside, always in a different place. So I challenged myself to locate on GE each of the spots where he worked. Learning how to set up concentric rings to give me narrow zones to search through has helped a lot.