Large enough to allow at least twenty students to work and lined with pickled animals in glass jars. In one corner of the room stands a basin into which ice-cold water pours from a gargoyle's mouth, while in another is a student supply cupboard. There is also a blackboard on which the Potions Master can write the class's instructions. The room is especially cold, particularly in the winter when students are able to see their own breath.

As cold as the rest of the dungeons. Come here to learn the ancient science of Alchemy which focuses on the study of nature's four basic elements (fire, earth, air, and water), as well as the transmutation of substances (such as base metals into gold)

"The Slytherin common room was a long, low underground room with rough stone walls and ceiling, from which round, greenish lamps were hanging on chains. A fire was crackling under an elaborately carved mantelpiece ahead of them, and several Slytherins were silhouetted around it in carved chairs." - J.K. Rowling