I'm a huge fan of the "Fail" blog that shows off photos of things that didn't go so well.
Ever seen a staircase that ends at a wall? What about a door with the steps that lead up to it 10 feet away?
So, I'm thinking of a category that will entail finding something that could only be described as a "Human Error" and waymarking it. Naturally, I'm not interested in duplicating the unintentionally funny signs group.
I'm looking for input on this before I go and create a category. Perhaps we need to limit it to 'construction' mistakes, perhaps not.