The Daily Mail today had a collection of "blunders" visible at schools, including some which were construction related. However, ignorance must be bliss, because one of the so-called "blunders" was not a mistake at all:
The caption for this photograph reads: "To cartwheel your way up there? This has to be one of the more extreme entrances to a school gym, with a door featuring half way up the wall in a undisclosed location." However, I've seen these before, and typically these are doors to a upper floor mechanical room to allow HVAC or other equipment to be easily delivered or removed. A forklift is used to lift the equipment up to the doors.