optical illusions...

Is this a DUCK? Or is it a RABBIT?
Look carefully.

In this illusion you see a girl. But if you look carefully you can also see
an old woman's face.  HINT: Use the girls face as the old woman's nose.

In this illusion you most likely see an old man's face. If you look
VERY closely you can see a couple kissing.  HINT: The couple's
faces start by the old mans nose and left eye.

Which CENTER circle is larger?
They are both equally the same.
AMAZING ISN'T IT?

How many feet and legs does this elephant really have?

Look at this picture... Do you see a face or the word 'Liar'?

In this picture do you see a woman or a sax-phone player?

In this illusion do you see a vase, or two faces?

Impossible crane... This crane can be drawn but it cannot be built.

Which red line is longer?
The one to your right seems longer, but only because of the wait it's drawn.
Measure them and they're exactly equal!

These red lines look like they're bent.
But in reality, they're perfectly straight... Get a ruler!

Stair at the little ball at the top. And you'll see that the staircase
will flip and it will turn upside down.

Stare at this flag for 45 seconds concentrating on it really good. Then scroll down quickly and use the space provided below and blink. You will see the RED, WHITE, AND BLUE AMERICAN FLAG appear in the white blank space!

Here are a few more

Rotating dot whirlpool
Wow! Try staring at this for more than 5 seconds
without going crazy. Then try following it round! =)
Curves constantly die out and then re-evolve as
part of another curve.

Find your blind spot

Another popular one - and quite unnerving if you've never seen it before...
Close your left and eye and just focus your right eye on the tiny cross. At some point the big circle will disappear as it crosses your 'blind spot'. If you can't see this effect, then try sitting closer/further from the screen.

The below are not a optical illusions but try it out anyways