If you’re a fan of terrible designs, you might’ve run across one of the many subreddits dedicated to just that. On pages like r/CrappyDesign, people share everything from overly-decorated homes to tools that don’t remotely work the way they’re supposed to.

But those subreddits are full of something else that might surprise you: stairs. Why is that so surprising? Well, because it seems like stairs would be kind of difficult to mess up. Sure, most of us aren’t designers or builders. But stairs only have a few basic qualities that aren’t hard to understand. As long as they’re even, what could go wrong?

Well, as it turns out…a lot. There are all kinds of wacky stairs — including those with enormous gaps, ones leading to nowhere, stairs covered with confusing carpeting, and then the completely unnecessary ones. It makes you wonder, “Who on earth thought this was a good idea?”

Maybe that’s the reason subreddits like these have become so popular. Design isn’t always about thinking outside the box, after all. It’s also about being practical and making sure people can use the structures you build. Check out these 35, stair design fails that’ll have you wondering who thought they were ever okay.