As I mentioned in the previous frame, to get to the second level of the first building you needed cross a landing where all of the floorboards had been removed. This is the gap to which I was referring. It actually wasn't either exceptionally scary or difficult (though the drop was more severe than it appears here; the image has compressed somewhat), but you only needed to make one wrong move and you were going to feel it.

The worst part is that caution can in fact be more dangerous because you keep second-guessing yourself rather than just jumping across the gaps confidently. In my case, as I mentioned previously, my big concern was whether I'd end up dropping the Olympus which made me more tentative and hesitant than was healthy. Nonetheless we both made it across and back intact.