So I was looking for arches a few weeks ago when our photography group had that as a theme. While lots of buildings around here do have some archway openings, my favorite photo of the set I took for that theme is actually barely an arch at all.

Untitled Reflection, Neckar River, Tübingen

At first glance it looks to me like the window in the top half of the photo is a reflection of that arched opening in the bottom half of the image. But then it becomes clear that the entire scene is a reflection of an off-screen building. The different textures of the water with the reflection, though, give that initial illusion that the building at the bottom might be “real”.  I like it.