Gryffindor girls' staircase

The staircase was located in Gryffindor Tower which was accessible from the seventh floor of Hogwarts Castle. It led to the girls' dormitories.

History
Back in the Founder era, which was the time when Godric Gryffindor, Helga Hufflepuff, Rowena Ravenclaw and Salazar Slytherin owned the school, a common belief was that girls were more trustworthy than boys. This made Gryffindor enchant the girls' staircase so that it would turn into a slide should a boy try to enter. Nothing og this type occurs with the boys' dormitory.

In the 1994-1995 school year, the staircase turned on Gryffindor boys, Ron Weasley and Harry Potter. They had been trying to contact Hermione Granger, a close companion by going to her dormitory. The stairs turned into the magnificent slide and Ron fell. Hermione herself came down moments later after a pair of laughing girls.

Behind the Scenes

 * The enchantment on the girls' staircase is probably an extension of the Spell, Glisseo which was used by Hermione when being persued by Death Eater.