A mind-boggling optical illusion. Whichever of the two skyscrapers in the image you focus on, seems to be the one in front.

From Weekly Filet #89, in October 2012.

Egypt: the building I thought was in front is actually behind the other one.

💔 Some older links might be broken — that's the state of the web, sadly. If you find one, ping me.

You might also like

The Bond Villain’s Lair: Skyfall’s Abandoned Island

The Bond Villain’s Lair: Skyfall’s Abandoned Island

The Year in Photos, part 1 of 3

The Year in Photos, part 1 of 3

TIME’s Drones Issue: Go Behind the Cover

TIME’s Drones Issue: Go Behind the Cover

Aerial Virtual Tour of New York

Explore more →

Explore collections

Bingeworthy Podcasts & Episodes 36 links Making Sense of the Climate Crisis 41 links Making Sense of Artificial Intelligence 40 links The Art of Thinking (Differently) 28 links Work Smarter 17 links How Technology is Reshaping Our Humanity 10 links Hidden Wonders 11 links All-time favourites 20 links The Stuff Our Modern World Runs On 13 links Stories, too good to put down 16 links

Book recommendations

2025 Book Club Books curious minds wished they discovered sooner Our most popular crowd-curated book recommendations thus far. Read the post →

Book Club illustration

Weekly Filet Book Club All recommendations from previous editions, at a glance. Find your next read → 📚 David's Bookshelf The books that shaped how I see the world and inform how I think and act. Browse the bookshelf →