The walls
I'd like to know, because I sure don't!
I'd chase that person down and say, "Give me back my secrets! I still haven't figured them all out yet!"
the heavens
myself....
Me and me only
My Bestest Friend in the whole wide world :)
The sea
Only me... and a couple of my imaginary friends :D
no one knows them all. (not even my s/o of 22 years)