National Geographic have put together this cool “infinite photograph”. They’ve used hundreds of user submitted photos to create an infinitely zoomable photo mosaic.

To see what I mean let’s go through an example. You start off with this image. Use the yellow border to choose an area to zoom into:

The app will zoom in to show the selected area made up of hundreds of small photos:

You can carry on zooming in forever. Eventually you’ll zoom in to a single image and the whole process starts again – hence the infinite…