One think that I like about my Garmin eTrex Venture HC is that it comes with software that you put on your computer. It is called mapsource. Anyway, you upload data from the GPS to your computer. Then you can open your track in Google Earth. Maybe I am a bit geeky, but it really entertains me to look at my ride on a Google Earth map.
My sister has been working on developing maps of some federal land (U.S. Forest Service land) for her work. There are a bunch of horse trail riders that she has working to help her. They record the locations of significant things that they find on their rides and she can use these in the maps. As part of her work, she was able to go on a 14 mile trail ride with them to check the accuracy of some of their data. Tough job, but somebody's got to do it..........