Colour Illusion – click on the picture to open it in a new window, then follow the instructions.

(via digg – thanks, David!)

Blast Off

Part of a Flickr pool called “Looking Into The Past”. Simple premise: take a photo of a location while holding up an old photo of the same location so that it lines up with the new. Some don’t work as well as others, but the ones that do, like the one above, look to me like time windows.

(via Neatorama and  Tom™5)