A suburban street in New Zealand has become an unlikely tourist attraction, after people shared photos on social media of a bizarre optical illusion.

Dunedin's Baldwin St holds the title of being the steepest street in the world.

Baldwin Street holds the proud title of being the steepest street in the world. Photo / @plscallmesam Instagram
Baldwin Street holds the proud title of being the steepest street in the world. Photo / @plscallmesam Instagram
When photos of houses on the street are taken on an angle (pictured), it creates the illusion that they are all sinking into the ground. Photo / @keybunny Instagram
When photos of houses on the street are taken on an angle (pictured), it creates the illusion that they are all sinking into the ground. Photo / @keybunny Instagram

When photos of houses on the street are taken on an angle, it creates the illusion that they are sinking into the ground.

People flock to the street to take photos with the properties that appear lopsided, and upload them to Instagram.

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This Instagram user posted a photo of this house on Dunedin Street with the caption: 'How to mess with people's minds - anchor your letterbox so that it's on the same incline as the street. Voila! Your house is now sinking!'. Photo / @jemimakate Instagram
This Instagram user posted a photo of this house on Dunedin Street with the caption: 'How to mess with people's minds - anchor your letterbox so that it's on the same incline as the street. Voila! Your house is now sinking!'. Photo / @jemimakate Instagram
People have been flocking to the street to take photos with the properties that appear lopsided, to upload them to Instagram. Photo / @rachelpayne292 Instagram
People have been flocking to the street to take photos with the properties that appear lopsided, to upload them to Instagram. Photo / @rachelpayne292 Instagram

Residents in the street are reportedly used to people puffing up and down the steep street to take photos.

The street also hosts the annual Cadbury Jaffa Race, where thousands of the red chocolates are released at the top of the hill, raising money for charity as they make their way to the bottom.

Residents who live on the world's steepest street are reportedly used to people puffing up and down the steep street to take photos. Photo / @curtis2611 Instagram
Residents who live on the world's steepest street are reportedly used to people puffing up and down the steep street to take photos. Photo / @curtis2611 Instagram
By tilting the camera on an angle, when this Instagram user took the photo, the house appears as if it is sinking into the ground. Photo / @nathantimblin Instagram
By tilting the camera on an angle, when this Instagram user took the photo, the house appears as if it is sinking into the ground. Photo / @nathantimblin Instagram
This group of friends appeared to be struggling to make it up the steep street. Photo / @vanyhub Instagram
This group of friends appeared to be struggling to make it up the steep street. Photo / @vanyhub Instagram