What Is This and Where Was I?

I thought we'd move this to the website. I was messin' around one day and decided to do this after noticing something in a corner of something else.

Yes, I'm being vague. Otherwise I might give it away. Actually, I think this is kind of easy, but I've already had someone guess what it was and get it wrong.

So, what the heck? Go for it.

Comment here or on Facebook. It's good practice.