Potions lessons took place down in one of the dungeons. It was colder here than up in the main castle, and would have been quite creepy enough without the pickled animals floating in glass jars all around the walls. Icy cold water pours from a gargoyle's mouth into a basin in the corner, and this classroom is big enough to hold a double class, (about 20 cauldrons). Students can see their breath in this room during the winter months.