This is Rhein II by Andreas Gursky, it’s the most expensive photo ever sold (if you exclude celeb wedding and baby photos) and I’m really not sure why.
I can pretty safely say this is the most boring photo in the top 10 most expensive photos. I would much rather have Billy the Kid:
Or this hundred year old, hand layered photo of a moonlight relfected in a pond:
Or, to be honest, almost any photo. $4.4m is utterly absurd.