Noah's Ark

Much like everyone else in the world right now, I've been following the tragedy in Japan. In thinking about everything with the tsunami, earthquake and the resulting disaster even with the protection measures they had. Seeing this, I really can't understand how some people still say that stories in the Bible are just that, stories. With the size of buildings today, there is still a lot of damage. Imagine Old Testament times where buildings were not as structurally sound and much shorter, thus easily destroyed with the same amount of flooding. No preventative measures against earthquakes and no barriers against tidal waves. The tragedy in Japan is still ongoing after several days, even with all the clean up efforts and support from around the globe. So it's not hard to believe an unrestricted tsunami could last 40 days and 40 nights before it spreads thin or is absorbed into the Earth. But why is the story of Noah's Ark so hard to believe? Maybe it's the animals coming to the ark, but it is quite common for animal to sense danger and react to avoid it. So animals coming out from their caves, nests, burrows et cetera to seek safety and get gathered up by Noah and his family. Not much else is out of the ordinary in Ark story and anything that is, is likely due to the story being transferred verbally before finally being recorded. Ever played broken telephone? It's like that. I really don't see what is difficult to accept about the events with Noah's Ark actually happening.