Moaning Myrtle's bathroom contains the entrance to the Chamber of Secrets. The entrance is a sink with a snake scratched onto the tap, opened by speaking in Parseltongue. This causes the sink to open into a pipe large enough for a person to slide down. At the bottom of this chute is a tunnel leading to the Chamber of Secrets. When Tom Riddle opened the Chamber in 1943, Myrtle was sulking in a stall. When she heard him, she opened the door, saw the Basilisk, and died immediately, becoming a ghost. Her bathroom remains operational, but is rarely used by students because of Myrtle's disagreeable presence.
