Hogwarts the Hogwarts Express that students take at the start of each school year. Students board the train from the also fictional and hidden Platform 9¾ at King's Cross station in London. The train arrives near Hogwarts, some time after nightfall. From there, first-year students are accompanied by the "Keeper of the Keys, Game and Grounds" (which was Hagrid during the first novel) to small boats, which magically sail across the lake and get them near the entrance of Hogwarts. The older students ride up to the castle in carriages pulled by creatures called Thestrals. When the first-year students initially arrive
Hogwarts tend to "move around", and so do the stairs in the grand staircase. Witches and wizards cannot Apparate or Disapparate in Hogwarts grounds, except when the Headmaster lifts the enchantment, whether only in certain areas or for the entire campus, so as to make the school less vulnerable when it serves the headmaster to allow Apparition. Electricity and electronic devices are not found at Hogwarts. In "Harry Potter and the Goblet of Fire", Hermione indicates that due to the high levels of magic, "substitutes for magic (that) Muggles use" such as computers, radar and electricity "go haywire" around Hogwarts. Radios