Oh, a gate! I was guessing one of those slightly domed house-tops.
Yeah, the curse of any artist (visual, musical, literary, or other) is the detail that is perfect in its own right, but just happens to trigger a misunderstanding in situ. On DevArt alone, I've seen a cloud of bubbles that accidentally looked like a teddybear's eyes, nose, and ears; a bridge shadow that happened to align with a horse's head and make him a unicorn; a distant mountain pass that looked like the foreground man had a hat; a lovely ornate belt with raised scrolling that really wasn't *supposed* to add up to a cartoony face....
And of course the same thing happens with writing: "Watch the blackboard while I run through it again" (ouch!), or "He brought up his breakfast and ate it quickly" (yuck!), and so on.
It's why I love places like DeviantArt and people who volunteer to be each others' first readers, beta testers, and so on; we get help catching our errors from people who've made 'em too.