Do you want to break your brain? The Penrose Triangle is a triangular impossible object that is an optical illusion and cannot exist as a solid object. The Penrose Triangle was first created in 1934 by Swedish artist Oskar Reutersvard. Also, an interesting figure is a Hypercube - this is a special type of cube, which is neither a cube, nor a ball, nor a square, nor a sphere, nor anything else of the known geometric figures. Interesting shapes in the form of a starter cursor and pointer called Penrose Triangle and Hypercube!