Ana...It's a single exposure. I was shooting through a window to a window on the other side of a one room wide 1700's Historic house in Washington's Crossing State Park in PA. The reflection you see is of me and what was behind me. You can see the reflection of Delaware River Bridge peeking through the trees on the middle left side of the photo. I was going to toss this one when I saw it in the LCD screen because it really didn't look like anything, but for some reason decided against it.