Couple Discovers they Were In the Same Photo 11 Years Before Meeting

This sounds like something straight out of a romance novel. While looking through old photos, a couple in China discovered that they visited the same place at the same exact time 11 years ago, and happened to catch it on camera! They made the discovery after the husband spotted himself in the background of his wife's photo. 

Do you believe in serendipity? Or is this just dumb luck?