What is this photo that showed up in my iPhone?

Factual Questions
1

And not just my iPhone, someone else was asking me about it too. For me it is dated 4/18/2010, and has no other metadata. Does anyone else have this photo in their Camera Roll, and know what it is and where it came from?

2

I found it in the TreuHDR Gallery.

3

This one.

Edit: (Too slow.)

4

Thanks, I have TrueHDR, so that must be where it came from. I didn’t realize the app put samples in there.