Windmills. Despite turning round and round, they never seem to cool the air down!
This windmill was discovered in a park with a lake. Its blue and yellow colours are reminiscent of the Parramatta Eels NRL team - but a quick Google search reveals at least another dozen sports teams using the same colours. And there are school colours that are blue and yellow, too!
With the absence of any other information about this windmill, placing a geocache here seemed most appropriate. At least it will get noticed. 😘