The best information that I've been able to obtain is that this was once a pheasant farm, and that the owner has passed away.
This was the primary target for the day, and I have to give a big shout-out to my coworker Al for tipping me off about this place.
This was a surprise.
We were in the midst of a 40-minute hike to find another location. As sometimes happens when walking significant distances, your eyes wander to the ground, and your mind wanders away. Suddenly, I looked up and there it was sitting just off the side of our path.
I love when this happens.