Many people say that geocaching takes them to places they never would have known about, like this little lake. With no visible inlet or outlet, I presume that it is spring-fed or below the water table. I have seen it quite low but have never seen it dry. I have also seen an Osprey catch a fair sized fish out of it.
So come by for the cache, but stay for a bit and enjoy its beauty.
The geocache is a pill bottle with a magnet taped to it. With the information and the name of the cache, this should be a quick find.