I'm no expert. But I've looked, and looked some more, and then I looked at SeanF's enlargement.

Maybe I'm just dense, but I'm not seeing anything to get all that excited about. Yes, there is an "object" of some sort there. I wouldn't call it metallic, and I certainly wouldn't say it was obvious. Fact of the matter, I couldn't even find it until SeanF created the enlargement.

[Hoagspeak]I'm much more interested in the 2 stones that form a straight line from the lower left to the upper right. Perhaps they are remnants of paveing stones that formed an ancient roadway?[/Hoagspeak]

As you can see from my example above, if your looking for something "unusual", your imagination can easily lead you to make false conclusions.