A visit to the Alhambra led this 20th c. Dutch artist to optical oddities like water that flows up as well as down
Pinterest  The world's catalog of ideas ... Optical illusion floor in 
the Sunshine City shopping mall in Tokyo ... Like an optical illusion :) ..... 
sculpture, furniture, functional sculpture, architectural oddities ...... relief pattern 
wall in the Alhambra, ... Skeleton dance costume, late 19th or early 20th century, 
Tibet.