This came into my mind when I was viewing Google satellite maps and noticed some interesting formation of objects somewhere in the middle of a lake. I'd like to find out more about it, but since I don't know what it is, I can't even decide where (be it SE or elsewhere) to start.
Is it a geographical formation? Is it an animal or group of ones? Is it a photographic noise? Is it a result of a human activity (e.g. a land art)?
Other example could be an arbitrary detail of some photo. I mean, if you found a picture on a Wikipedia page about a-bombs, topic of your choice would be military or physics, what you want to ask about something pictured in the background that is not related to tha main object?
I believe such question would be perfect for Q/A format. Do we have a good place to start?