I agree absolutely. It looks like a very ordinary sedimentary outcrop, with natural joints and fractures, like those you could find in many mountain ranges. The bedding is entirely concordant with the topography, which is typical in geology. One would think a stranded boat would be unlikely to perch in perfect conformity like that.
Back to the original topic: the pic's shown do look like natural rock formations to me too. But then who's to say that if Noah's Ark really existed that there would even be remains of it to find today. I would think it would have made great kindling to dry some off their stuff or cook with. It would have also made great lumber for shelters and homes. Just more thoughts for the "what if" game.