You begin to wonder if it's real

I've always wondered if there's any reality to it all.... Are we really in 3-D? Or is it all just an optical illusion in 2-D? F philosophy... Let's just enjoy some stuff.

My personal favorites:
Dots
Impossible triangle
Impossible monument
Spiral? This one gives me a headache
Coke bottle
Swimmer
Politicians meeting their end
Bug spray
How many faces?

Some links:
Amazing pavement drawings
Julian Beever
Akiyoshi's illusion pages
Art of Reutersvard
Optical Illusions
grand-illusions.com
Optical illusion galleries at eyetricks.com
Hall of illusions
And ofcourse... M. C. Escher

What???? No song??? Aaaargh.... impossible...


In a forest known as heartbreak
In a clearing in the wood
'Cross a pathway called confusion
Toward the garden of delight

You'll reach the river of desire
And meekly try and cross it
While the valley of love
Keeps avoiding you
Because it's only an illusion
Only an illusion

Upon the hill of high ideals
You begin to wonder if it's real
You are reaching sleep's oasis
You begin to wonder how you feel

But it happens so quickly
It doesn't fit into your scenes
Tossin' and turnin'
The star of so many scenes
It's only an illusion
It's only an illusion

ILLUSION by Uriah Heep