Location from Harry Potter by J.K. Rowling
A hidden underground chamber deep beneath Hogwarts, built by Salazar Slytherin and accessible only by speaking Parseltongue, serving as the lair of a thousand-year-old Basilisk.
The Chamber of Secrets is Slytherin's final argument in a debate he lost a millennium ago. He built it in secret beneath the school, placed within it a monster only his bloodline could control, and left it as insurance — a weapon against the Muggle-born students the other founders insisted on admitting. For a thousand years it was legend, a ghost story older students used to frighten first-years. Then Tom Riddle found it, and fifty years later his diary-shade found it again through Ginny Weasley. The chamber smells of damp stone and something reptilian. The Basilisk — sixty feet of armored serpent with killing eyes — made it a tomb for centuries. After Harry destroyed the beast, the chamber became a source of Basilisk fangs, one of the few substances capable of destroying Horcruxes. Ron Weasley later mimicked Parseltongue to reopen it during the Battle of Hogwarts.
A long, dimly lit subterranean hall lined with towering stone pillars carved with intertwining serpents. Green-tinged torchlight casts writhing shadows. The floor is damp and black. At the far end, a massive stone face of Salazar Slytherin rises from the wall, its mouth the passage from which the Basilisk emerges. Puddles of dark water pool between the flagstones. The ceiling vanishes into shadow overhead. A circular entrance in a girls' bathroom — Moaning Myrtle's bathroom — spirals down a long pipe to reach it.
Also known as: the Chamber of Secrets, Chamber of Secrets, Slytherin's chamber