The Shrinking Mill of Port Colborne, in Ontario, Canada, is an intriguing optical illusion that makes a giant grain elevator shrink the closer you get to it.

Usually, things tend to appear smaller in the distance and grow in size the closer you get to them, but that rule does not apply to the grain elevator located in Port Colborne’s Sugarloaf Marina. As motorists turn left onto Lakeshore Road west from Cement Road, they have their view filled by this massive concrete building in the distance. It’s so big it literally fills the horizon, but as you drive forward, instead of getting even bigger, it starts to shrink, and by the time you make the left-hand bend, it’s just an average industrial building in the distance. The mind-bending optical illusion has such a strong effect that nine out of ten people who see it for the first time drive back to get another look.