If you notice a marble rolling uphill at the Crooked House, you might start to think you’ve had one too many pints at this farmhouse-turned pub. But it’s actually the building’s unusual structure at work. Thanks to subsidence as a result of mining in the 1800s, the left side of the pub sits a little over one meter (about four feet) lower than the right, giving way to some seriously trippy optical illusions to enjoy with your ale.

Built in 1765, the farmhouse officially became a public house in 1830. The pub was originally called the Siden House (siden means “crooked” in the local Black Country dialect). Not everyone found its architectural quirks charming: The building was condemned as unsafe in the 1940s and was all set to be knocked down. Thankfully Wolverhampton and Dudley Breweries came to the pub’s rescue, armoring the building with girders that rendered it safe for visitors while also allowing its lopsided charm to remain intact.

The whimsical venue has served visitors from around the world, but hasn’t lost any of its local pub feel.