One of the saddest sights in the world is witnessing the aftermath of someone who really, really tried to do a great job, but just couldn’t quite cut the mustard. Sometimes, their error is so obvious that you wonder if they actually knew what they were supposed to be doing. Other times, the mistake they made is one that you could have easily made yourself.
26A staircase to nowhere

27If you aren't already in a wheelchair, you will be after this

28Boys School

29Slight hazard in the hallway

30Is it worth the risk?

31I'm no architect but I think the design called for more bolts

32This doesn't seem like an excellent idea

33Hotel Room with a Pervy Window

34Built right in

35Worst Playground Planning

36The worst thing about German toilets is the audience

37Wall in front of a door

38The bridge is finished, boss

39An overpass in the Philippines

40Custom Staircase

41Looks Safe and Sound

42Late to class door

43Handicap Fire Exit

44In case of fire, please use the external stairs

45Wrong side down

46Just Why?

47What's holding up this basement?

48Fire Escape on to the street below

49Someone doesn't like Cyclists

50That's not how patio doors are installed

Regarding #15: This is actually not a design fail. This is the Palm Hotel in King City, California, directly across the street from the high school I went to in the Nineties. It was intended as a way to catch the eye of potential customers; I even stayed there once when my hometown was flooded and evacuated in 1995.
Thank you for including it, though; it was terrific to see. I was actually born in King City, so it’s kind of like coming home. 😀