Skip to main content

Impossible World

Catalogue of impossible figures, ambiguous objects and Escher-adjacent architecture, kept up by one very devoted collector.

Opens in a new tab. We do not control this site and it may have changed since we catalogued it.

How to get the most from it

Impossible World sits in Optical Illusions under Weird, filed as coffee break.

  • Set aside five to fifteen minutes and give it your proper attention.
  • It works on a phone or a desktop, so open it on whatever is nearest.
  • It works with the sound off, so it is fine on a train or in a quiet office.
  • No account needed — you can start without signing up.
  • Go in expecting something brainy and clever.

About this category: Illusion collections and perception demos. The good ones keep working after you have been told exactly how they work.

Good for

  • Filling a coffee break properly
  • Giving your brain a workout
  • Being impressed by a clever idea
  • A quiet break at your desk
  • Killing time on your phone
  • Trying it with zero commitment

Impossible World: quick answers

Is Impossible World free?

Yes. Impossible World is free to use and needs no account.

Do I need an account to use Impossible World?

No. You can use Impossible World without signing up for anything.

Does Impossible World work on a phone?

Yes. Impossible World works on phones as well as desktop browsers.

Is Impossible World safe for work?

Yes, we file it as safe for work. It also works muted.

How long does Impossible World take?

We file it as "Coffee break": Five to fifteen minutes of proper attention.

More in Optical Illusions

All 13 in Optical Illusions

Same mood: brainy

All brainy sites
  • A calendar of every conjunction, eclipse and meteor shower coming up, with charts drawn for your own location.

  • Every plant and animal anybody has photographed and posted, mapped, with a community that will identify your mystery beetle within hours.

  • The wiki of a movement for owning your own website: guides, tools and real examples of people publishing on their own domains.

    • 1 hr+
    • Desktop
  • Numbers-heavy tower defence with endless mode, research trees and the general energy of a very well-kept spreadsheet.

    • 1 hr+
    • Desktop

Keep exploring

Have a site of your own? Suggest it for Detour or browse the AltFTool backlinks hub.