Board Thread:Spoilers!/@comment-26198810-20150907034213/@comment-24674051-20150911143255

The actual vault may exist in some other realm, and the symbols/doors are simply portals from that world into the vault.

However, my gut tells me that the door we are seeing is the one we saw in Quiet Minds, in FTL, hidden in the EF near the Camelot border.