Possibly nothing. For assorted reasons, I've been doing two-and-a-half people's work this year. Obviously it leaves very little time and energy for hobbies. These bits were mostly painted in February and retouched this weekend so there may be no March work there at all. Anyway...
On the first glance, it may look like just a simple circle of stones. The truth may be something entirely different, though. It can be a historical monument, a place of unknown worship, or a collection of resin pieces by Ainsty. That's something to think about. (The figure is just for scale, not painted in March.)
From the same source comes this second piece. The subject matter is dead serious. Five million people die each year to common diseases caused by insufficient sanitation. While modern flush toilets are convenient to the user, they waste immense amounts of pure water. A simple step back could save fresh water and improve the cycle of nutrients. Besides, it has been suggested that the term "netty" is derived from "necessity", which fittingly describes the central role of these facilities in any civilised society.
Of course, the inner schoolboy in me kept snickering at every step to the very thought of poop-related matters. I can't fool anyone.
Did I mention that I've been working too much?