Now, obviously it's not recommended that you pinch anything from this alluring treasure trove during your first play-through, as you'll spoil the joy of discovery for yourself. But it's great to know it's there if you get bored and just want to have a casual play around.
How do I find this secret room?
To access this mystical land of goodies you'll need to be playing on the PC. Simply type "COC QASMOKE" into the command console and you'll be warped there. Take a look at the video below, courtesy of the fine folks at IGN, for a walkthrough:
Fun fact: the room was actually built to help Bethesda's QA department test the game, but clearly the developers didn't mind leaving it in there for players.