This is fake. They haven’t been sat on that rock for 50 years. If you look closely you can clearly see her swimsuit is different in the second photo, it has stripes on it. And the guy’s shorts seem to have a more floral pattern in the latter photo.Also, if someone sat on a rock for 50 years, it would have made the news. My theory is, they simply returned to the same location 50 years later, and recreated the original photo.
Jokes aside, it really is fake. No one will see this but I feel like I should mention it anyway. See how the grass and the water on the stone are exactly the same in both photos?