Okay-- here's the " secret " regarding the " secret doors " on the Liberty and other ships-- ready?? They are plainly marked with invisible ink-- you have to have special glasses to see the invisible ink.
The glasses are only available from the pursers desk-- 3 pair at a time.
Better to try to get them very early or very late. Platinum members get priority.
Faint of heart types should not try to access the secret door areas.