We have all admired the lithograph Waterfall by Maurits C. Escher (1961). His waterfall recycles its water after driving the water wheel. If it could work, this would be the ultimate perpetual motion machine that also delivers power! If we look closely, we see that Mr. Escher has deceived us, and any attempt to build this structure using solid masonry bricks would fail.

The Land Of The Insane

In the land of men, where many abound,

Are some hale and hearty, some mentally unsound

Who among us can hear them call,

From a momentous past , they suddenly fall

Into a chasm that is too hard to gauge

For now they remain in a cage of their own,

bitter, cold and forlorn.