World's Largest Photo.

Photo: Chris Carlson

Photographers from the non-profit Legacy Project used the world's largest camera (based on the camera obscura [wiki] principle) to take the world's largest photo in a converted air hangar:

The image then appeared upside down and flipped left to right on a sheath of light-sensitive fabric the length of one-third of a football field and about three stories tall.

The cloth was exposed for 35 minutes. The photographers and 60 volunteers developed the image by moving the fabric into an enormous, 1-foot-deep tray.

Links: Legacy Project's Website | MSNBC | ABC News | TakeGreatPictures