Location from Chamber of Secrets by J.K. Rowling
A hidden underground chamber deep beneath Hogwarts, built by Salazar Slytherin a thousand years ago and accessible only by speaking Parseltongue -- the lair of the Basilisk and the place where Tom Riddle waits with Ginny Weasley's dying body.
Also known as: the Chamber of Secrets, Chamber of Secrets, Slytherin's chamber