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We’ve all had a DIY project that didn’t go exactly as planned. Maybe the shelf ended up slightly crooked, the paint looked nothing like the color you imagined, or you realized halfway through that you had absolutely no idea what you were doing. It happens to the best of us—and usually, the damage can be fixed with a little patience, a trip to the hardware store, and perhaps a few YouTube tutorials.

But some construction, design, and home improvement projects take things to an entirely different level. Today, we scoured the internet to find some of the funniest and most baffling fails out there. From bizarre renovations and questionable building choices to architectural decisions that leave you wondering how they ever made it past the planning stage, these examples had people doing a serious double take. Keep scrolling, Pandas, and see which ones made you ask the obvious question: “Who thought this was a good idea?”

#1 “I’m Sure You’re All Wondering Why I’ve Gathered You Here Today”

#2 How Do You Mess Up Designing A Garage? Like This, Apparently

#3 The Absolute Trash Design Of My School. This Is The Place Where Every Hallway Intersects

Building something impressive takes a lot of planning, skill, and, ideally, a few people willing to double-check the work. But even with all that preparation, things can still go wrong. A material may not behave as expected, a design may overlook something important, or a small mistake may only become obvious once the building is already standing. And when the project is a skyscraper, stadium, bridge, or entire housing complex, fixing that mistake can be anything but simple.

#4

#5 “Congrats To The Neighbor Below For The New Chandelier” LOL

#6 This Is Abysmal

Take Chicago’s former Standard Oil/Amoco Building, now known as the Aon Center. Designed by Edward Durell Stone and built between 1970 and 1973, the skyscraper was originally covered in thin slabs of white marble. It looked impressive, but the material proved to be a poor match for Chicago’s famously harsh winters. In 1974, a piece of marble fell from the tower and landed on the neighboring Prudential Tower. Over time, repeated freeze-thaw cycles caused the thin marble panels to weaken and bulge, eventually requiring the entire exterior to be replaced with granite. The repair bill? A staggering $180 million.

As architect Raymond Gomez explained, the building was one of the first major structures to use thin-sliced marble cladding, with the panels measuring only around three-quarters of an inch thick. Years of expansion and contraction during Chicago’s freezing winters gradually weakened the material. It was a costly reminder that even a beautiful design choice needs to be able to survive the environment it is placed in.

#7 Hmmm

#8 My Eyes Hurt

#9 2nd Floor Jacuzzi Anyone?

Sometimes, however, the problem becomes obvious almost immediately. Tropicana Field in Florida, which cost around $130 million to build and opened in 1990, has a distinctive domed roof with several catwalks suspended above the baseball field. The issue? Baseballs have a habit of flying upward. The catwalks regularly get in the way, with balls sometimes hitting them, becoming stuck, or bouncing off in unpredictable directions. Even more concerning, some lighting fixtures above the field could potentially send hot pieces of shattered glass raining down if struck. Perhaps not exactly the kind of surprise players were hoping for during a game.

#10 Why

#11 This Is A Terrible Idea

#12 This Monstrosity

Then there is London’s Millennium Bridge, which opened in 2000 to celebrate the new millennium. The pedestrian bridge stretches across the River Thames and was designed with a sleek, modern appearance. Unfortunately, the public quickly discovered that the bridge had a rather unexpected feature: it wobbled. When large numbers of people walked across it, many unconsciously fell into the same rhythm, creating a synchronized sideways movement that caused the bridge to sway noticeably.

The problem was serious enough that the bridge had to close just two days after opening. The project had already gone £2 million over its original £16 million budget, and an additional £5 million was eventually spent on modifications. Engineers later installed a passive damping system, similar in principle to shock absorbers, to control the movement. While the wobble was an expensive embarrassment at the time, the experience also changed how engineers understand and design pedestrian bridges.

And despite its rocky start, the Millennium Bridge has clearly managed to win people over. In 2025, the “wobbly bridge” marked 25 years since it first opened, with the BBC reporting that around 90,000 people crossed it on its opening day on June 10, 2000. Reflecting on the bridge’s journey, City Bridge Foundation chair Paul Martinelli said, “Despite its teething troubles, the bridge has become firmly established in the hearts of Londoners.” Not a bad comeback for a bridge that once made people wonder whether the ground beneath their feet had suddenly started moving.

#13 The Chairs Waiting For You In The Laser Eye Clinic’s Reception

#14 Very Bad Design

#15 As If Public Toilets Didn’t Give Me Enough Anxiety

Not every famous construction mistake was caused by poor planning, either. The Leaning Tower of Pisa began tilting almost as soon as it was being built. Construction started in 1173, and the tower began to lean after the third floor was completed because it was being built on soft, unstable ground made up of clay, sand, and silt. As the builders continued, they tried to compensate by making some of the upper floors slightly taller on one side. The result is a tower that does not simply lean—it also has a subtle curved shape, giving it something of a giant architectural banana appearance.

#16 This Fountain That Looks Like A Perfect Place To Sit Down

#17 Flat Carpet In A Hotel In Cologne, Germany Imitating A Curvy Surface

#18 Fake Hope Escalator

Of course, building something is only half the job. Keeping it in good condition is just as important. The Pruitt-Igoe housing complex in St. Louis, designed by architect Minoru Yamasaki, was built in the 1950s and consisted of 33 eleven-story buildings. The project reflected modernist architectural ideas and was intended to provide modern housing. However, a lack of proper maintenance, along with wider social and economic problems, contributed to the complex’s rapid decline. The buildings were eventually demolished in 1976, becoming one of the most famous examples of how even ambitious architectural projects can fail when long-term maintenance and broader conditions are overlooked.

#19 Interesting Staircase Solution For Narrow Houses

#20 We Were Looking At Houses In Baltimore This Weekend And Came Across This Gem

There Is No Mirror In The Middle, It’s A Completely Symmetrical Bathroom That 2 People Can Use The Toilet In At The Same Time

#21 Step Out Of A Bathtub Down A Flight Of Stairs, Anyone?

#22 Horrible Fridge Placement

Construction and design mistakes can be incredibly expensive. They can require millions of dollars in repairs, months or years of additional work, and an enormous amount of labor to correct. In some cases, they can also create genuine safety risks. But the good news is that even major failures can teach architects and engineers valuable lessons. Every bridge that wobbles, building panel that falls, or tower that starts leaning gives future designers more information about what to avoid.

#23 One Closet. 6 Feet Above The Ground And No Stairs To Get To It. Why

#24 Ballroom Where Everyone Downstairs Can See Up Your Skirt

#25 They Built This School Like One Month Ago

#26 This Chandelier At A Restaurant I Ate At Bothers Me So Much

And then we have today’s collection, which focuses on some of the less serious (but arguably much funnier) design and construction mistakes. From stairs that lead absolutely nowhere to toilets that offer about as much privacy as standing in the middle of a public square, these examples make you wonder whether anyone stopped to look at the finished project before saying, “Looks good to me.” Which one made you laugh the most, Pandas? And if you know an architect, engineer, builder, or design enthusiast who would appreciate these, send this collection their way!