There is an interesting story here about a couple who discovered that while the wife was being photographed at Disney World as a child, the husband was in the background being pushed by his father in a stroller. The husband’s family lived in Canada at the time, and the wife’s lived in FL.
A couple on my block has a similar story. She is Filipino and the husband is maybe 15 years older than her and previously married. She was looking at some pictures from his first honeymoon in Hong Kong and in a picture of he and his ex-wife eating at a cafe, saw her cousin at a table in the background. She realized if that was her cousin, then an elbow sticking in from the edge of the frame must be hers. While she was still living in the Philippines, her family had taken a trip to Hong Kong and eaten in the same restaurant as her future husband.
Does anyone know any other stories like this? Ideally the people involved would have lived far from each other at the time.