It's just a single, clickable link with a simple URL. As Deezer's oft-quoted riddle states,
"What once was lost, now is found. Or is it the other way around? Run to the end... Look to the sky... Don't try to jump, it's up way too high. Nine of us in all, unlocked by the sound."
The last four words are particularly significant. Being surrounded by mods, all I can say is that the riddle is to be understood in an in-game context. Hope it helps.