Here Are 15 Of The Most Closely Guarded Secrets Only Two Living People Know

5. The symbols on Led Zeppelin’s album cover

No one knows what the first symbol in the above album cover means. This album contained their classic song Stairway To Heaven. Not even the band members or the producers know the meaning of that symbol. Each of the four members agreed to contribute for the album cover with a symbol they chose. That’s why only Jimmy Page knows what that symbol means, and by the looks of it, he is not going to tell us about it before he dies.