It’s usually the prices at Harrods that would have you rubbing your eyes to check if what you’re seeing can be believed, but now a piece of street art is having the same effect.

Artist Joe Hill has created an optical illusion that makes it appear as though there is a big hole in the helipad and through to the swanky Knightsbridge store.

Taking four days to create and measuring more than 20 feet wide and 35 feet long, the 3D artwork reveals a preview to the store's summer sale that will open on Saturday.

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