SEE IT: 'Best' UFO picture released decades after hidden, expert says it's real

The "Calvine photo" was taken on Aug. 4, 1990, by a pair of hikers around Calvine, Scotland, and has been the object of myths, theories, and speculation for over three decades, according to a report.

The image shows a diamond-shaped object hovering above the earth while a fighter jet appears to be approaching it.