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 however, make an exception. Rowling explains this by saying that the radios are not powered by electricity but by magic. Hogwarts is on the shore of a lake, sometimes called the Black Lake. In that lake are merpeople, Grindylows, and a giant squid. The giant squid does not attack humans and sometimes acts as a lifeguard when students are in the lake. Hogwarts is a coeducational, secondary boarding school, taking children from ages eleven to eighteen. Education at Hogwarts is not compulsory, with some students being home schooled as stated in the seventh book. Rowling initially said there are about