Inside the Wall street Gold Mine - This is one of our historic buildings at my work that we take care of. My photo from 4 days ago, the image looking up and out of a silo is the same structure. The round wall on the right hand side of this photograph is actually the outside wall of that silo, and I am in a tunnel that wraps around the entire outside of the silo. It's a very interesting building, and makes for some very interesting photos!
Another cool thing about this shot that I noticed, is you get no sense of scale. This tunnel was no more than 4ft tall and only 3ft wide. I was pretty cramped when I shot this.