New York Metro Infographic
Visual Poetry 2006—A numerical value is assigned to every letter of the alphabet. Adding the values of all letters, one gets a number that represents the overall word. Using this system, an entire poem is arranged on a circular path. The diameter of the circle is based on the length of the poem.
Detailed visualisation representing the number of people to have lived versus  been killed in wars, massacres and genocide during the recorded history  of humankind. View full imagery here
David McCandless is an amazingly talented infographic designer who has come up with this investigation on colour related to emotion and culture. This can also be bought as a poster from his Store