Space - Frank Tinsley Lunar Unicycle
A rather old design from Frank Tinsley for a Lunar Unicycle! Or perhaps more properly, a monowheel.
The wheel around the middle is actually a spare tyre for the main wheel.
One source image, on set of ortho views, and one polished picture, with the unicycle finding the Luna-9 soviet soft lander, (This composited onto an Apollo panorama).
I came up with a different design for the solar panel parasol, as the one in the picture looked more than a bit clumsy...