I'd Have Drowned Already

On the third try, I still can't find Noah's Ark.

I know the cache is still there, because someone logged it yesterday, while I was at work thinking about where in the world it could be. I have the coordinates. The clue is permanently inscribed upon my brain. After visiting the site alone twice, I took a fellow geocacher on the third visit, but we still could not locate our treasure. I put my hands on everything within ten feet of the coordinates.

I'm running out of change for the meter.

So how about it, Round Dancer? Care to point me in the right direction?