Upside-Down Pool Illusion at Kanazawa Museum

Art Travel

Oct 5, 2026 · 3 min read

Upside-Down Pool Illusion at Kanazawa Museum

A walk through Kanazawa’s 21st Century Museum of Contemporary Art reveals a startling sight: visitors seemingly defying gravity and walking on the ceiling. The Upside-Down Pool artwork is an as an illusion that challenges visitors’ perceptions.

Visiting the 21st Century Museum of Contemporary Art in Japan, you might feel a slight disconnect. Step into the Upside-Down Pool Illusion and your eyes play tricks. The paradox is undeniable: people appear to walk on the ceiling. The pool illusion is the opposite of what it seems. For a fresh experience, Kanazawa’s artwork urges visitors to snap an Instagramable photo while narrowly avoiding a police mask.

The enigmatic spectacle: the Upside-Down Pool

The 21st Century Museum of Contemporary Art's Upside-Down Pool Illusion is an optical perception designed by artist Mejaruz — to be used for the first time since 2014 in the Kanazawa Museum. A lot of visitors think it is a pool, but it is not. It is installed underground in a special space as an artwork of 21st century. The famous artworks are also installed in the museum. It is a maze of floor, ceiling, and water, challenging the viewer. The art illusion uses the concept of inverting the real world by using special mirrors and water. The strategically placed mirrors create the illusion of space being flipped. The moment you step near the edge, you see a flat surface looking like a ceiling and underneath, a pool. By inversion, the structure is turned upside down.

Art of the inverted: the museum experience

The Kanazawa aquatic illusion narrows down the effect of a pool to its extreme. With it, the artist could make us rethink the role of art in a person's life. It makes us feel small in the face of our own imagination. The artwork points out the relationship between art and reality. It blurs the lines between illusion and real life. In a chaotic time around the world, it's not only a testament to the timelessness of art but also a reminder of how the art can help you break free from reality."

Diving in: the cleverness behind the illusion

A test of perception

The museum's illusion draws the viewer to walk closer, seeking the source of the deception. The closer you get, the more you see you can’t believe — where the water seems to pour from. The pool we see is not where the water is.

The mechanics of the illusion

The art structure is installed underground and the entire area is covered with water. What the illusion achieves is more than what meets the eye. The overload of sensory information disorients the brain, tricking it into seeing what isn’t real. The appearance of the pool being upside down and the ceiling appearing as the floor is a visual sleight of hand. Despite the surprising experience, the interplay of water, mirrors, and perspective achieves the illusion. When you stand on what appears to be the ceiling, you’re actually on the floor.

Practical advice: Seeing the illusion

  • Visit the museum: The illusion is permanently installed in the Kanazawa museum. It is located underground with mirrors, water, and perspective.
  • Stay 30 minutes: If possible, enjoy the illusion for 30 minutes to take in the structure’s complexity. Your brain will be able to adjust and enjoy the experience to the fullest.
  • Share the experience: The museum encourages visitors to share their experience with visitors.
  • Stay hydrated: The museum experience can be dehydrating. There are a few water fountains around the museum.

Questions readers ask

How does the Upside-Down Pool Illusion at the Kanazawa Museum actually work?

The illusion uses a combination of mirrors and water to create the effect of an inverted space. Mirrors are strategically placed to flip the perception of the room, making the ceiling appear as the floor and vice versa. When you stand on what seems like the ceiling, you're actually on the floor, and the pool you see is just a reflection.

Is the Upside-Down Pool Illusion a permanent exhibit at the Kanazawa Museum?

Yes, the Upside-Down Pool Illusion is a permanent exhibit at the 21st Century Museum of Contemporary Art in Kanazawa. It was first installed in 2014 and has been a popular attraction ever since. Visitors can experience it year-round, and it's a must-see for those visiting the museum.

Who created the Upside-Down Pool Illusion?

The Upside-Down Pool Illusion was created by artist Mejaruz. It's a unique installation that challenges visitors' perceptions and encourages them to question the relationship between art and reality.

Can I take photos of the illusion and share them on social media?

Absolutely, the museum encourages visitors to take photos and share their experience. It's a great opportunity to capture a unique and Instagram-worthy moment.

What should I expect when I visit the Upside-Down Pool Illusion?

When you visit, you'll likely feel a bit disoriented as your brain tries to process the inverted space. It's designed to challenge your perception and make you question what's real. It's recommended to spend about 30 minutes to fully take in the experience and allow your brain to adjust.

Is the Upside-Down Pool Illusion suitable for all ages?

The illusion is a visual experience that can be enjoyed by people of all ages. However, young children or individuals with certain medical conditions might find the disorienting effects particularly strong. It's always a good idea to be mindful of individual comfort levels.

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