This is one of the weirdest public art projects I've ever seen: a sculpture that moves, but it's actually static to the naked eye. Only if you record it on a time-lapse video you would be able to appreciate its motion.
Its name is Möbius and it was made by art and design firm Eness for the city of Melbourne, Australia. They placed the sculpture in streets and plazas, changing it like you would do with a figure in a stop-motion animation movie, photographing the change. [Eness via Change the Thought via This Is Colossal]