Ascending and Descending – the Lego version

Ascending and Descending – the M. C. Escher version

Ascending and Descending – the Lego "Create the Impossible" advertising version

Andrew Lipson and Daniel Shiu made a model of M. C. Escher’s Ascending and Descending (1960) optical illusion artwork completely out of Lego bricks. If you’re not familiar with it, you’ll notice the monks just keep walking up. It was also an advertisement.

Sources:
Flickr>>
Andrew Lipson>>
Zhiq>>