Prefects' Bathroom

Inside, the bathroom's walls, floor, and single sunken bathtub are all made of white marble, lit softly by a candle-filled chandelier that impressed Harry on his first visit. The rectangular tub is the size and depth of a swimming pool, and even has a diving board, but unlike an ordinary pool the tub is lined with about a hundred taps, each with a differently coloured jewel set into the handle. Each tap automatically releases not only water, but bubble bath (a different kind of bubble bath for each colour-coded handle). A pile of fluffy white towels are kept in one corner