Julian Beever is a guy from the UK who has been doing pavement art for at least the last 10 years. he has done these pictures in many countries around the world.
They have a special flare to them that when viewed from a certain angle give you that amazing 3D effect.
You can check out more of his pictures here.
Go look, you will be amazed.
Blogger is experiencing some problems loading pictures at the moment, so as soon as it is back running I will add some pictures.