(Warning for Taxidermy and other such disturbing things in links)
The infamous Queen of Hearts' Quarters aren't always equivalent to the fifth floor tea room, mind you. Some older captives may remember being swapped and visiting what appeared to be a normal tearoom on Mirror Side. Her Majesty can access and hide it as needed - a Queen is entitled to her privacy, after all.
Predictably, the room is rather dark - red and black, with splashes of white and gold for accents. It is also a very large room, easily triple the size of the default rooms and more like a fancy suite. The bed is large and ornate (and Queen-sized, naturally) and everything in that area is impeccable. Not so much as a sheet is out of place, and it appears more like a picture from a catalog than a place where someone lives. A vial is on the dresser.
There is a sitting area that is similarly orderly, with an elegant chaise lounge in front of a low table. On that table - a reflecting ball on a small scepter, and it is emitting a gentle, white glow. There are some other chairs, and a chess set but they don't matter. The Queen of Hearts rarely permits guests in her chambers.
It's the remaining third of the room that appears to have been used, or at the very least it seems lively in its own respect. There are many, many, many shelves, filled to the brim with not just books but trinkets, treasures and all sorts of oddities. There are a few dozen globes that slowly spin on their own, and a pair of pocket watches hanging from a peg - one belonging to Her Majesty and another dangling. More mysteriously though there are countless jars, and many of them emit a golden glow. Others have very interesting contents - and some of them will even watch you, as they nervously dart around their prison. There are also various parts scattered around, as well as the means to stitch them together.
It is quite the collection, if you are fortunate enough to view it - or, unfortunate enough. Who allowed you to witness Her Majesty's Quarters?!