I want to thank all of you who ventured a guess as to what those three haphazardly stacked pots were. M and M win the most entertaining and imaginative guess. Their submission read "It's obvious, a baked clay sculpture of a World War One Warship speaking tube from the bridge to the engine room!" Bravo!!... an excellent description.
For those of you still interested... the structure is... a self-draining, cascading bird bath. It was created quite by accident. I had emptied the pots and stacked them carelessly in preparation for putting them away. When I looked at them from a distance, I could see they might have a use this season after all. Picture if you will .... wait, first of all let me tell you each pot has a drain hole dead centre in the bottom. Now picture what would happen if you ran water into the top (tipped to the side) pot. The pot would fill with water but only to the drain hole level. The water then drains from the top pot, down through the lower pots, and onto the flat base... where it then cascades off. We will be hooking up the automatic water system to feed the top pot (and keep the water from growing stagnant).
All you need is water and gravity... lots of that around :-)
That's it for today... have a great day everyone and stay safe, please. We must all be careful not to relax too soon. There is too much at stake.