Take a look at our wiki. The Cache Parameters
page includes cache type and attribute icons.
Green stars indicate cache that have earned one or more Recommendations
. We should probably add something about them (and other icons?) to the parameters page. These work pretty much exactly
as Favorites on Groundspeak, but we had them first. Coincidence?
If you go to the given cache page, however, you'll notice the green star again and a note about how many recommendations a cache has.