Platform 9¾

Platform 9 3/4 is the Platform that the Hogwarts Express leaves from every year. It is located at King's Cross Station. The only way to get to it is for a wizard to walk into the barrier between platforms 9 and 10. In Harry Potter and the Chamber of Secrets, Dobby does something to this barrier so that Harry and Ron can't get through and have to take Arthur Weasley's flying Ford Angela to Hogwarts.