The Penrose stairs, also known as the impossible staircase, is a two-dimensional depiction of a staircase in which the stairs make four 90-degree turns as they ascend or descend yet form a continuous loop. Although the staircase is conceptually impossible, it does interfere with your perception since it looks like a person could climb forever and never get any higher.
Watching the video is the easiest way to see how it works. I’ve included a drawing which is linked in the video description.
http://www.youtube.com/watch?v=VAAZBhA8Pfc
See my Youtube woodworking channel for additional projects
http://www.youtube.com/playlist?list=PLcLIJdluqiyiI7J9qp5VAXrALMOftr0RT
Estimated Cost
$5
Estimated Time Investment
An Hour or Two (0-2 Hours)
Finish Used
None
Recommended Skill Level
Starter Project